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Finding the Fourth Proportional to 158,423.62, 218,589.13 and 90,418.86

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Solution

The fourth proportional to 158,423.62, 218,589.13 and 90,418.86 is: 124,757.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,423.62 : 218,589.13 = 90,418.86 : x
  2. Step 2: Convert to fraction form
    158,423.62/218,589.13 = 90,418.86/x
  3. Step 3: Cross multiply
    158,423.62x = 218,589.13 × 90,418.86
  4. Step 4: Simplify right side
    158,423.62x = 19,764,579,441.23
  5. Step 5: Solve for x
    x = 19,764,579,441.23/158,423.62
  6. Step 6: Final answer
    x = 124,757.78

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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.