Home / 157,839.30-217,822.91-86,220.50

Finding the Fourth Proportional to 157,839.30, 217,822.91 and 86,220.50

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Solution

The fourth proportional to 157,839.30, 217,822.91 and 86,220.50 is: 118,986.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,839.30 : 217,822.91 = 86,220.50 : x
  2. Step 2: Convert to fraction form
    157,839.30/217,822.91 = 86,220.50/x
  3. Step 3: Cross multiply
    157,839.30x = 217,822.91 × 86,220.50
  4. Step 4: Simplify right side
    157,839.30x = 18,780,798,691.44
  5. Step 5: Solve for x
    x = 18,780,798,691.44/157,839.30
  6. Step 6: Final answer
    x = 118,986.83

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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.