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Finding the Fourth Proportional to 104,962.65, 157,386.20 and 71,720.25

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Solution

The fourth proportional to 104,962.65, 157,386.20 and 71,720.25 is: 107,540.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,962.65 : 157,386.20 = 71,720.25 : x
  2. Step 2: Convert to fraction form
    104,962.65/157,386.20 = 71,720.25/x
  3. Step 3: Cross multiply
    104,962.65x = 157,386.20 × 71,720.25
  4. Step 4: Simplify right side
    104,962.65x = 11,287,777,251.95
  5. Step 5: Solve for x
    x = 11,287,777,251.95/104,962.65
  6. Step 6: Final answer
    x = 107,540.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.