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Finding the Fourth Proportional to 158,520, 218,757.60 and 91,452

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Solution

The fourth proportional to 158,520, 218,757.60 and 91,452 is: 126,203.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,520 : 218,757.60 = 91,452 : x
  2. Step 2: Convert to fraction form
    158,520/218,757.60 = 91,452/x
  3. Step 3: Cross multiply
    158,520x = 218,757.60 × 91,452
  4. Step 4: Simplify right side
    158,520x = 20,005,820,035.20
  5. Step 5: Solve for x
    x = 20,005,820,035.20/158,520
  6. Step 6: Final answer
    x = 126,203.76

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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.