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Finding the Fourth Proportional to 72,489.38, 100,035.52 and 42,295.46

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Solution

The fourth proportional to 72,489.38, 100,035.52 and 42,295.46 is: 58,367.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,489.38 : 100,035.52 = 42,295.46 : x
  2. Step 2: Convert to fraction form
    72,489.38/100,035.52 = 42,295.46/x
  3. Step 3: Cross multiply
    72,489.38x = 100,035.52 × 42,295.46
  4. Step 4: Simplify right side
    72,489.38x = 4,231,047,728.82
  5. Step 5: Solve for x
    x = 4,231,047,728.82/72,489.38
  6. Step 6: Final answer
    x = 58,367.83

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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.