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Finding the Fourth Proportional to 66,915.96, 92,340.90 and 38,630.76

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Solution

The fourth proportional to 66,915.96, 92,340.90 and 38,630.76 is: 53,308.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,915.96 : 92,340.90 = 38,630.76 : x
  2. Step 2: Convert to fraction form
    66,915.96/92,340.90 = 38,630.76/x
  3. Step 3: Cross multiply
    66,915.96x = 92,340.90 × 38,630.76
  4. Step 4: Simplify right side
    66,915.96x = 3,567,199,146.08
  5. Step 5: Solve for x
    x = 3,567,199,146.08/66,915.96
  6. Step 6: Final answer
    x = 53,308.64

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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.