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Finding the Fourth Proportional to 66,910.71, 92,321.82 and 38,221.20

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Solution

The fourth proportional to 66,910.71, 92,321.82 and 38,221.20 is: 52,736.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,910.71 : 92,321.82 = 38,221.20 : x
  2. Step 2: Convert to fraction form
    66,910.71/92,321.82 = 38,221.20/x
  3. Step 3: Cross multiply
    66,910.71x = 92,321.82 × 38,221.20
  4. Step 4: Simplify right side
    66,910.71x = 3,528,650,093.87
  5. Step 5: Solve for x
    x = 3,528,650,093.87/66,910.71
  6. Step 6: Final answer
    x = 52,736.70

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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.