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Finding the Fourth Proportional to 72,489.63, 100,035.87 and 42,295.71

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Solution

The fourth proportional to 72,489.63, 100,035.87 and 42,295.71 is: 58,368.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,489.63 : 100,035.87 = 42,295.71 : x
  2. Step 2: Convert to fraction form
    72,489.63/100,035.87 = 42,295.71/x
  3. Step 3: Cross multiply
    72,489.63x = 100,035.87 × 42,295.71
  4. Step 4: Simplify right side
    72,489.63x = 4,231,088,147.12
  5. Step 5: Solve for x
    x = 4,231,088,147.12/72,489.63
  6. Step 6: Final answer
    x = 58,368.19

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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.