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Finding the Fourth Proportional to 66,915.74, 92,344.90 and 36,700.78

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Solution

The fourth proportional to 66,915.74, 92,344.90 and 36,700.78 is: 50,647.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,915.74 : 92,344.90 = 36,700.78 : x
  2. Step 2: Convert to fraction form
    66,915.74/92,344.90 = 36,700.78/x
  3. Step 3: Cross multiply
    66,915.74x = 92,344.90 × 36,700.78
  4. Step 4: Simplify right side
    66,915.74x = 3,389,129,859.02
  5. Step 5: Solve for x
    x = 3,389,129,859.02/66,915.74
  6. Step 6: Final answer
    x = 50,647.72

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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.