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Finding the Fourth Proportional to 73,128.75, 109,693.13 and 17,724.75

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Solution

The fourth proportional to 73,128.75, 109,693.13 and 17,724.75 is: 26,587.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,128.75 : 109,693.13 = 17,724.75 : x
  2. Step 2: Convert to fraction form
    73,128.75/109,693.13 = 17,724.75/x
  3. Step 3: Cross multiply
    73,128.75x = 109,693.13 × 17,724.75
  4. Step 4: Simplify right side
    73,128.75x = 1,944,283,217.34
  5. Step 5: Solve for x
    x = 1,944,283,217.34/73,128.75
  6. Step 6: Final answer
    x = 26,587.13

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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.