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Finding the Fourth Proportional to 66,971.52, 92,419.72 and 38,290.88

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Solution

The fourth proportional to 66,971.52, 92,419.72 and 38,290.88 is: 52,840.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,971.52 : 92,419.72 = 38,290.88 : x
  2. Step 2: Convert to fraction form
    66,971.52/92,419.72 = 38,290.88/x
  3. Step 3: Cross multiply
    66,971.52x = 92,419.72 × 38,290.88
  4. Step 4: Simplify right side
    66,971.52x = 3,538,832,408.15
  5. Step 5: Solve for x
    x = 3,538,832,408.15/66,971.52
  6. Step 6: Final answer
    x = 52,840.86

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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.