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Finding the Fourth Proportional to 157,755.12, 217,702.72 and 86,136.72

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Solution

The fourth proportional to 157,755.12, 217,702.72 and 86,136.72 is: 118,869.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,755.12 : 217,702.72 = 86,136.72 : x
  2. Step 2: Convert to fraction form
    157,755.12/217,702.72 = 86,136.72/x
  3. Step 3: Cross multiply
    157,755.12x = 217,702.72 × 86,136.72
  4. Step 4: Simplify right side
    157,755.12x = 18,752,198,235.88
  5. Step 5: Solve for x
    x = 18,752,198,235.88/157,755.12
  6. Step 6: Final answer
    x = 118,869.03

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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.