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Finding the Fourth Proportional to 71,999.86, 99,359.42 and 40,168.68

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Solution

The fourth proportional to 71,999.86, 99,359.42 and 40,168.68 is: 55,432.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,999.86 : 99,359.42 = 40,168.68 : x
  2. Step 2: Convert to fraction form
    71,999.86/99,359.42 = 40,168.68/x
  3. Step 3: Cross multiply
    71,999.86x = 99,359.42 × 40,168.68
  4. Step 4: Simplify right side
    71,999.86x = 3,991,136,746.97
  5. Step 5: Solve for x
    x = 3,991,136,746.97/71,999.86
  6. Step 6: Final answer
    x = 55,432.56

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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.