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Finding the Fourth Proportional to 158,645.25, 218,926.44 and 90,657.90

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Solution

The fourth proportional to 158,645.25, 218,926.44 and 90,657.90 is: 125,105.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,645.25 : 218,926.44 = 90,657.90 : x
  2. Step 2: Convert to fraction form
    158,645.25/218,926.44 = 90,657.90/x
  3. Step 3: Cross multiply
    158,645.25x = 218,926.44 × 90,657.90
  4. Step 4: Simplify right side
    158,645.25x = 19,847,411,304.88
  5. Step 5: Solve for x
    x = 19,847,411,304.88/158,645.25
  6. Step 6: Final answer
    x = 125,105.61

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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.