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Finding the Fourth Proportional to 80,570.72, 120,731.88 and 43,135.76

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Solution

The fourth proportional to 80,570.72, 120,731.88 and 43,135.76 is: 64,637.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,570.72 : 120,731.88 = 43,135.76 : x
  2. Step 2: Convert to fraction form
    80,570.72/120,731.88 = 43,135.76/x
  3. Step 3: Cross multiply
    80,570.72x = 120,731.88 × 43,135.76
  4. Step 4: Simplify right side
    80,570.72x = 5,207,861,400.03
  5. Step 5: Solve for x
    x = 5,207,861,400.03/80,570.72
  6. Step 6: Final answer
    x = 64,637.15

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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.