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Finding the Fourth Proportional to 158,718.88, 218,997.84 and 91,612

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Solution

The fourth proportional to 158,718.88, 218,997.84 and 91,612 is: 126,404.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,718.88 : 218,997.84 = 91,612 : x
  2. Step 2: Convert to fraction form
    158,718.88/218,997.84 = 91,612/x
  3. Step 3: Cross multiply
    158,718.88x = 218,997.84 × 91,612
  4. Step 4: Simplify right side
    158,718.88x = 20,062,830,118.08
  5. Step 5: Solve for x
    x = 20,062,830,118.08/158,718.88
  6. Step 6: Final answer
    x = 126,404.81

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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.