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Finding the Fourth Proportional to 157,609.31, 217,491.93 and 89,642.79

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Solution

The fourth proportional to 157,609.31, 217,491.93 and 89,642.79 is: 123,701.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,609.31 : 217,491.93 = 89,642.79 : x
  2. Step 2: Convert to fraction form
    157,609.31/217,491.93 = 89,642.79/x
  3. Step 3: Cross multiply
    157,609.31x = 217,491.93 × 89,642.79
  4. Step 4: Simplify right side
    157,609.31x = 19,496,583,407.68
  5. Step 5: Solve for x
    x = 19,496,583,407.68/157,609.31
  6. Step 6: Final answer
    x = 123,701.98

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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.