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Finding the Fourth Proportional to 80,210.89, 120,274.80 and 42,760.90

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Solution

The fourth proportional to 80,210.89, 120,274.80 and 42,760.90 is: 64,119.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,210.89 : 120,274.80 = 42,760.90 : x
  2. Step 2: Convert to fraction form
    80,210.89/120,274.80 = 42,760.90/x
  3. Step 3: Cross multiply
    80,210.89x = 120,274.80 × 42,760.90
  4. Step 4: Simplify right side
    80,210.89x = 5,143,058,695.32
  5. Step 5: Solve for x
    x = 5,143,058,695.32/80,210.89
  6. Step 6: Final answer
    x = 64,119.21

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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.