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Finding the Fourth Proportional to 62,871.39, 86,764.34 and 34,578.90

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Solution

The fourth proportional to 62,871.39, 86,764.34 and 34,578.90 is: 47,719.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,871.39 : 86,764.34 = 34,578.90 : x
  2. Step 2: Convert to fraction form
    62,871.39/86,764.34 = 34,578.90/x
  3. Step 3: Cross multiply
    62,871.39x = 86,764.34 × 34,578.90
  4. Step 4: Simplify right side
    62,871.39x = 3,000,215,263.53
  5. Step 5: Solve for x
    x = 3,000,215,263.53/62,871.39
  6. Step 6: Final answer
    x = 47,719.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.