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Finding the Fourth Proportional to 207,887.20, 311,863.47 and 67,613.02

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Solution

The fourth proportional to 207,887.20, 311,863.47 and 67,613.02 is: 101,430.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,887.20 : 311,863.47 = 67,613.02 : x
  2. Step 2: Convert to fraction form
    207,887.20/311,863.47 = 67,613.02/x
  3. Step 3: Cross multiply
    207,887.20x = 311,863.47 × 67,613.02
  4. Step 4: Simplify right side
    207,887.20x = 21,086,031,034.38
  5. Step 5: Solve for x
    x = 21,086,031,034.38/207,887.20
  6. Step 6: Final answer
    x = 101,430.16

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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.