Home / 391,140,587,003.40-586,710,880,505.10-139,885,485,870.60

Finding the Fourth Proportional to 391,140,587,003.40, 586,710,880,505.10 and 139,885,485,870.60

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Solution

The fourth proportional to 391,140,587,003.40, 586,710,880,505.10 and 139,885,485,870.60 is: 209,828,228,805.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,140,587,003.40 : 586,710,880,505.10 = 139,885,485,870.60 : x
  2. Step 2: Convert to fraction form
    391,140,587,003.40/586,710,880,505.10 = 139,885,485,870.60/x
  3. Step 3: Cross multiply
    391,140,587,003.40x = 586,710,880,505.10 × 139,885,485,870.60
  4. Step 4: Simplify right side
    391,140,587,003.40x = 82,072,336,585,023,452,872,704
  5. Step 5: Solve for x
    x = 82,072,336,585,023,452,872,704/391,140,587,003.40
  6. Step 6: Final answer
    x = 209,828,228,805.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.