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Finding the Fourth Proportional to 270,693.92, 406,079.76 and 83,720

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Solution

The fourth proportional to 270,693.92, 406,079.76 and 83,720 is: 125,592.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,693.92 : 406,079.76 = 83,720 : x
  2. Step 2: Convert to fraction form
    270,693.92/406,079.76 = 83,720/x
  3. Step 3: Cross multiply
    270,693.92x = 406,079.76 × 83,720
  4. Step 4: Simplify right side
    270,693.92x = 33,996,997,507.20
  5. Step 5: Solve for x
    x = 33,996,997,507.20/270,693.92
  6. Step 6: Final answer
    x = 125,592.02

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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.