Home / 83,140.40-124,624.20-45,642.80

Finding the Fourth Proportional to 83,140.40, 124,624.20 and 45,642.80

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Solution

The fourth proportional to 83,140.40, 124,624.20 and 45,642.80 is: 68,416.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,140.40 : 124,624.20 = 45,642.80 : x
  2. Step 2: Convert to fraction form
    83,140.40/124,624.20 = 45,642.80/x
  3. Step 3: Cross multiply
    83,140.40x = 124,624.20 × 45,642.80
  4. Step 4: Simplify right side
    83,140.40x = 5,688,197,435.76
  5. Step 5: Solve for x
    x = 5,688,197,435.76/83,140.40
  6. Step 6: Final answer
    x = 68,416.77

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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.