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Finding the Fourth Proportional to 92,708.20, 138,975.90 and 64,628.20

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Solution

The fourth proportional to 92,708.20, 138,975.90 and 64,628.20 is: 96,882.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,708.20 : 138,975.90 = 64,628.20 : x
  2. Step 2: Convert to fraction form
    92,708.20/138,975.90 = 64,628.20/x
  3. Step 3: Cross multiply
    92,708.20x = 138,975.90 × 64,628.20
  4. Step 4: Simplify right side
    92,708.20x = 8,981,762,260.38
  5. Step 5: Solve for x
    x = 8,981,762,260.38/92,708.20
  6. Step 6: Final answer
    x = 96,882.07

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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.