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Finding the Fourth Proportional to 66,963.66, 100,387.77 and 38,494.59

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Solution

The fourth proportional to 66,963.66, 100,387.77 and 38,494.59 is: 57,708.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,963.66 : 100,387.77 = 38,494.59 : x
  2. Step 2: Convert to fraction form
    66,963.66/100,387.77 = 38,494.59/x
  3. Step 3: Cross multiply
    66,963.66x = 100,387.77 × 38,494.59
  4. Step 4: Simplify right side
    66,963.66x = 3,864,386,047.16
  5. Step 5: Solve for x
    x = 3,864,386,047.16/66,963.66
  6. Step 6: Final answer
    x = 57,708.70

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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.