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Finding the Fourth Proportional to 74,439.88, 102,728.88 and 40,447.98

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Solution

The fourth proportional to 74,439.88, 102,728.88 and 40,447.98 is: 55,819.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,439.88 : 102,728.88 = 40,447.98 : x
  2. Step 2: Convert to fraction form
    74,439.88/102,728.88 = 40,447.98/x
  3. Step 3: Cross multiply
    74,439.88x = 102,728.88 × 40,447.98
  4. Step 4: Simplify right side
    74,439.88x = 4,155,175,683.66
  5. Step 5: Solve for x
    x = 4,155,175,683.66/74,439.88
  6. Step 6: Final answer
    x = 55,819.22

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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.