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Finding the Fourth Proportional to 66,897.50, 92,321.37 and 38,221.88

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Solution

The fourth proportional to 66,897.50, 92,321.37 and 38,221.88 is: 52,747.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,897.50 : 92,321.37 = 38,221.88 : x
  2. Step 2: Convert to fraction form
    66,897.50/92,321.37 = 38,221.88/x
  3. Step 3: Cross multiply
    66,897.50x = 92,321.37 × 38,221.88
  4. Step 4: Simplify right side
    66,897.50x = 3,528,695,863.97
  5. Step 5: Solve for x
    x = 3,528,695,863.97/66,897.50
  6. Step 6: Final answer
    x = 52,747.80

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1.5x scale

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.