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Finding the Fourth Proportional to 158,391.33, 218,570.85 and 86,758.88

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Solution

The fourth proportional to 158,391.33, 218,570.85 and 86,758.88 is: 119,722.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,391.33 : 218,570.85 = 86,758.88 : x
  2. Step 2: Convert to fraction form
    158,391.33/218,570.85 = 86,758.88/x
  3. Step 3: Cross multiply
    158,391.33x = 218,570.85 × 86,758.88
  4. Step 4: Simplify right side
    158,391.33x = 18,962,961,053.79
  5. Step 5: Solve for x
    x = 18,962,961,053.79/158,391.33
  6. Step 6: Final answer
    x = 119,722.22

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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.