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Finding the Fourth Proportional to 71,541.06, 98,726.58 and 39,709.88

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Solution

The fourth proportional to 71,541.06, 98,726.58 and 39,709.88 is: 54,799.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,541.06 : 98,726.58 = 39,709.88 : x
  2. Step 2: Convert to fraction form
    71,541.06/98,726.58 = 39,709.88/x
  3. Step 3: Cross multiply
    71,541.06x = 98,726.58 × 39,709.88
  4. Step 4: Simplify right side
    71,541.06x = 3,920,420,521.20
  5. Step 5: Solve for x
    x = 3,920,420,521.20/71,541.06
  6. Step 6: Final answer
    x = 54,799.59

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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.