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Finding the Fourth Proportional to 71,154.74, 98,193.70 and 38,889.88

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Solution

The fourth proportional to 71,154.74, 98,193.70 and 38,889.88 is: 53,668.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,154.74 : 98,193.70 = 38,889.88 : x
  2. Step 2: Convert to fraction form
    71,154.74/98,193.70 = 38,889.88/x
  3. Step 3: Cross multiply
    71,154.74x = 98,193.70 × 38,889.88
  4. Step 4: Simplify right side
    71,154.74x = 3,818,741,012.88
  5. Step 5: Solve for x
    x = 3,818,741,012.88/71,154.74
  6. Step 6: Final answer
    x = 53,668.12

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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.