Home / 420,191.50-630,292.72-139,708.76

Finding the Fourth Proportional to 420,191.50, 630,292.72 and 139,708.76

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Solution

The fourth proportional to 420,191.50, 630,292.72 and 139,708.76 is: 209,564.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,191.50 : 630,292.72 = 139,708.76 : x
  2. Step 2: Convert to fraction form
    420,191.50/630,292.72 = 139,708.76/x
  3. Step 3: Cross multiply
    420,191.50x = 630,292.72 × 139,708.76
  4. Step 4: Simplify right side
    420,191.50x = 88,057,414,348.23
  5. Step 5: Solve for x
    x = 88,057,414,348.23/420,191.50
  6. Step 6: Final answer
    x = 209,564.96

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1.5x scale

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.