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Finding the Fourth Proportional to 74,366.55, 102,539.13 and 55,470.87

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Solution

The fourth proportional to 74,366.55, 102,539.13 and 55,470.87 is: 76,485.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,366.55 : 102,539.13 = 55,470.87 : x
  2. Step 2: Convert to fraction form
    74,366.55/102,539.13 = 55,470.87/x
  3. Step 3: Cross multiply
    74,366.55x = 102,539.13 × 55,470.87
  4. Step 4: Simplify right side
    74,366.55x = 5,687,934,750.14
  5. Step 5: Solve for x
    x = 5,687,934,750.14/74,366.55
  6. Step 6: Final answer
    x = 76,485.12

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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.