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Finding the Fourth Proportional to 66,617.29, 91,930.30 and 36,402.72

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Solution

The fourth proportional to 66,617.29, 91,930.30 and 36,402.72 is: 50,234.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,617.29 : 91,930.30 = 36,402.72 : x
  2. Step 2: Convert to fraction form
    66,617.29/91,930.30 = 36,402.72/x
  3. Step 3: Cross multiply
    66,617.29x = 91,930.30 × 36,402.72
  4. Step 4: Simplify right side
    66,617.29x = 3,346,512,970.42
  5. Step 5: Solve for x
    x = 3,346,512,970.42/66,617.29
  6. Step 6: Final answer
    x = 50,234.90

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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.