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Finding the Fourth Proportional to 158,909.63, 238,363.97 and 99,786.78

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Solution

The fourth proportional to 158,909.63, 238,363.97 and 99,786.78 is: 149,679.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,909.63 : 238,363.97 = 99,786.78 : x
  2. Step 2: Convert to fraction form
    158,909.63/238,363.97 = 99,786.78/x
  3. Step 3: Cross multiply
    158,909.63x = 238,363.97 × 99,786.78
  4. Step 4: Simplify right side
    158,909.63x = 23,785,572,535.38
  5. Step 5: Solve for x
    x = 23,785,572,535.38/158,909.63
  6. Step 6: Final answer
    x = 149,679.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.