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Finding the Fourth Proportional to 138,000.60, 206,981.70 and 44,515.80

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Solution

The fourth proportional to 138,000.60, 206,981.70 and 44,515.80 is: 66,767.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,000.60 : 206,981.70 = 44,515.80 : x
  2. Step 2: Convert to fraction form
    138,000.60/206,981.70 = 44,515.80/x
  3. Step 3: Cross multiply
    138,000.60x = 206,981.70 × 44,515.80
  4. Step 4: Simplify right side
    138,000.60x = 9,213,955,960.86
  5. Step 5: Solve for x
    x = 9,213,955,960.86/138,000.60
  6. Step 6: Final answer
    x = 66,767.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.