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Finding the Fourth Proportional to 40,487.78, 60,724.78 and 10,899.02

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Solution

The fourth proportional to 40,487.78, 60,724.78 and 10,899.02 is: 16,346.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,487.78 : 60,724.78 = 10,899.02 : x
  2. Step 2: Convert to fraction form
    40,487.78/60,724.78 = 10,899.02/x
  3. Step 3: Cross multiply
    40,487.78x = 60,724.78 × 10,899.02
  4. Step 4: Simplify right side
    40,487.78x = 661,840,591.72
  5. Step 5: Solve for x
    x = 661,840,591.72/40,487.78
  6. Step 6: Final answer
    x = 16,346.68

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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.