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Finding the Fourth Proportional to 71,706.20, 98,952.06 and 39,874.40

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Solution

The fourth proportional to 71,706.20, 98,952.06 and 39,874.40 is: 55,025.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,706.20 : 98,952.06 = 39,874.40 : x
  2. Step 2: Convert to fraction form
    71,706.20/98,952.06 = 39,874.40/x
  3. Step 3: Cross multiply
    71,706.20x = 98,952.06 × 39,874.40
  4. Step 4: Simplify right side
    71,706.20x = 3,945,654,021.26
  5. Step 5: Solve for x
    x = 3,945,654,021.26/71,706.20
  6. Step 6: Final answer
    x = 55,025.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.