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Finding the Fourth Proportional to 363,395.43, 545,129.46 and 138,944.70

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Solution

The fourth proportional to 363,395.43, 545,129.46 and 138,944.70 is: 208,430.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,395.43 : 545,129.46 = 138,944.70 : x
  2. Step 2: Convert to fraction form
    363,395.43/545,129.46 = 138,944.70/x
  3. Step 3: Cross multiply
    363,395.43x = 545,129.46 × 138,944.70
  4. Step 4: Simplify right side
    363,395.43x = 75,742,849,280.86
  5. Step 5: Solve for x
    x = 75,742,849,280.86/363,395.43
  6. Step 6: Final answer
    x = 208,430.94

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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.