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Finding the Fourth Proportional to 158,425.88, 218,627.71 and 86,808.61

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Solution

The fourth proportional to 158,425.88, 218,627.71 and 86,808.61 is: 119,795.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,425.88 : 218,627.71 = 86,808.61 : x
  2. Step 2: Convert to fraction form
    158,425.88/218,627.71 = 86,808.61/x
  3. Step 3: Cross multiply
    158,425.88x = 218,627.71 × 86,808.61
  4. Step 4: Simplify right side
    158,425.88x = 18,978,767,668.85
  5. Step 5: Solve for x
    x = 18,978,767,668.85/158,425.88
  6. Step 6: Final answer
    x = 119,795.88

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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.