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Finding the Fourth Proportional to 157,371.21, 217,165.47 and 89,387.97

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Solution

The fourth proportional to 157,371.21, 217,165.47 and 89,387.97 is: 123,351.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,371.21 : 217,165.47 = 89,387.97 : x
  2. Step 2: Convert to fraction form
    157,371.21/217,165.47 = 89,387.97/x
  3. Step 3: Cross multiply
    157,371.21x = 217,165.47 × 89,387.97
  4. Step 4: Simplify right side
    157,371.21x = 19,411,980,517.40
  5. Step 5: Solve for x
    x = 19,411,980,517.40/157,371.21
  6. Step 6: Final answer
    x = 123,351.54

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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.