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Finding the Fourth Proportional to 69,046.71, 103,572.36 and 19,127.31

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Solution

The fourth proportional to 69,046.71, 103,572.36 and 19,127.31 is: 28,691.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,046.71 : 103,572.36 = 19,127.31 : x
  2. Step 2: Convert to fraction form
    69,046.71/103,572.36 = 19,127.31/x
  3. Step 3: Cross multiply
    69,046.71x = 103,572.36 × 19,127.31
  4. Step 4: Simplify right side
    69,046.71x = 1,981,060,637.15
  5. Step 5: Solve for x
    x = 1,981,060,637.15/69,046.71
  6. Step 6: Final answer
    x = 28,691.60

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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.