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Finding the Fourth Proportional to 71,975.71, 107,963.56 and 38,649.93

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Solution

The fourth proportional to 71,975.71, 107,963.56 and 38,649.93 is: 57,974.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,975.71 : 107,963.56 = 38,649.93 : x
  2. Step 2: Convert to fraction form
    71,975.71/107,963.56 = 38,649.93/x
  3. Step 3: Cross multiply
    71,975.71x = 107,963.56 × 38,649.93
  4. Step 4: Simplify right side
    71,975.71x = 4,172,783,921.32
  5. Step 5: Solve for x
    x = 4,172,783,921.32/71,975.71
  6. Step 6: Final answer
    x = 57,974.89

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Similar ratio
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1.5x scale

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.