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Finding the Fourth Proportional to 158,372.66, 218,557.80 and 90,388.28

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Solution

The fourth proportional to 158,372.66, 218,557.80 and 90,388.28 is: 124,737.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,372.66 : 218,557.80 = 90,388.28 : x
  2. Step 2: Convert to fraction form
    158,372.66/218,557.80 = 90,388.28/x
  3. Step 3: Cross multiply
    158,372.66x = 218,557.80 × 90,388.28
  4. Step 4: Simplify right side
    158,372.66x = 19,755,063,622.58
  5. Step 5: Solve for x
    x = 19,755,063,622.58/158,372.66
  6. Step 6: Final answer
    x = 124,737.84

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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.