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Finding the Fourth Proportional to 71,067.65, 98,064.95 and 42,388.88

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Solution

The fourth proportional to 71,067.65, 98,064.95 and 42,388.88 is: 58,491.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,067.65 : 98,064.95 = 42,388.88 : x
  2. Step 2: Convert to fraction form
    71,067.65/98,064.95 = 42,388.88/x
  3. Step 3: Cross multiply
    71,067.65x = 98,064.95 × 42,388.88
  4. Step 4: Simplify right side
    71,067.65x = 4,156,862,695.49
  5. Step 5: Solve for x
    x = 4,156,862,695.49/71,067.65
  6. Step 6: Final answer
    x = 58,491.63

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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.