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Finding the Fourth Proportional to 169,158.40, 253,393.12 and 80,142.08

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Solution

The fourth proportional to 169,158.40, 253,393.12 and 80,142.08 is: 120,049.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,158.40 : 253,393.12 = 80,142.08 : x
  2. Step 2: Convert to fraction form
    169,158.40/253,393.12 = 80,142.08/x
  3. Step 3: Cross multiply
    169,158.40x = 253,393.12 × 80,142.08
  4. Step 4: Simplify right side
    169,158.40x = 20,307,451,694.49
  5. Step 5: Solve for x
    x = 20,307,451,694.49/169,158.40
  6. Step 6: Final answer
    x = 120,049.92

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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.