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Finding the Fourth Proportional to 71,516.57, 107,309.70 and 29,409.30

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Solution

The fourth proportional to 71,516.57, 107,309.70 and 29,409.30 is: 44,128.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,516.57 : 107,309.70 = 29,409.30 : x
  2. Step 2: Convert to fraction form
    71,516.57/107,309.70 = 29,409.30/x
  3. Step 3: Cross multiply
    71,516.57x = 107,309.70 × 29,409.30
  4. Step 4: Simplify right side
    71,516.57x = 3,155,903,013.16
  5. Step 5: Solve for x
    x = 3,155,903,013.16/71,516.57
  6. Step 6: Final answer
    x = 44,128.28

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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.