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Finding the Fourth Proportional to 158,443.35, 218,657.84 and 90,471.39

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Solution

The fourth proportional to 158,443.35, 218,657.84 and 90,471.39 is: 124,853.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,443.35 : 218,657.84 = 90,471.39 : x
  2. Step 2: Convert to fraction form
    158,443.35/218,657.84 = 90,471.39/x
  3. Step 3: Cross multiply
    158,443.35x = 218,657.84 × 90,471.39
  4. Step 4: Simplify right side
    158,443.35x = 19,782,278,719.20
  5. Step 5: Solve for x
    x = 19,782,278,719.20/158,443.35
  6. Step 6: Final answer
    x = 124,853.95

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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.