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Finding the Fourth Proportional to 86,301.92, 129,452.88 and 49,340

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Solution

The fourth proportional to 86,301.92, 129,452.88 and 49,340 is: 74,010

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,301.92 : 129,452.88 = 49,340 : x
  2. Step 2: Convert to fraction form
    86,301.92/129,452.88 = 49,340/x
  3. Step 3: Cross multiply
    86,301.92x = 129,452.88 × 49,340
  4. Step 4: Simplify right side
    86,301.92x = 6,387,205,099.20
  5. Step 5: Solve for x
    x = 6,387,205,099.20/86,301.92
  6. Step 6: Final answer
    x = 74,010

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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.