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Finding the Fourth Proportional to 158,356.28, 218,470.87 and 90,377.03

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Solution

The fourth proportional to 158,356.28, 218,470.87 and 90,377.03 is: 124,685.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,356.28 : 218,470.87 = 90,377.03 : x
  2. Step 2: Convert to fraction form
    158,356.28/218,470.87 = 90,377.03/x
  3. Step 3: Cross multiply
    158,356.28x = 218,470.87 × 90,377.03
  4. Step 4: Simplify right side
    158,356.28x = 19,744,749,031.26
  5. Step 5: Solve for x
    x = 19,744,749,031.26/158,356.28
  6. Step 6: Final answer
    x = 124,685.61

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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.