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Finding the Fourth Proportional to 66,712.60, 92,049.78 and 38,427.40

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Solution

The fourth proportional to 66,712.60, 92,049.78 and 38,427.40 is: 53,021.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,712.60 : 92,049.78 = 38,427.40 : x
  2. Step 2: Convert to fraction form
    66,712.60/92,049.78 = 38,427.40/x
  3. Step 3: Cross multiply
    66,712.60x = 92,049.78 × 38,427.40
  4. Step 4: Simplify right side
    66,712.60x = 3,537,233,715.97
  5. Step 5: Solve for x
    x = 3,537,233,715.97/66,712.60
  6. Step 6: Final answer
    x = 53,021.97

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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.