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Finding the Fourth Proportional to 157,651.67, 217,563.89 and 86,036.31

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Solution

The fourth proportional to 157,651.67, 217,563.89 and 86,036.31 is: 118,732.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,651.67 : 217,563.89 = 86,036.31 : x
  2. Step 2: Convert to fraction form
    157,651.67/217,563.89 = 86,036.31/x
  3. Step 3: Cross multiply
    157,651.67x = 217,563.89 × 86,036.31
  4. Step 4: Simplify right side
    157,651.67x = 18,718,393,854.66
  5. Step 5: Solve for x
    x = 18,718,393,854.66/157,651.67
  6. Step 6: Final answer
    x = 118,732.61

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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.