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Finding the Fourth Proportional to 158,349.54, 218,514.57 and 86,729.88

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Solution

The fourth proportional to 158,349.54, 218,514.57 and 86,729.88 is: 119,682.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,349.54 : 218,514.57 = 86,729.88 : x
  2. Step 2: Convert to fraction form
    158,349.54/218,514.57 = 86,729.88/x
  3. Step 3: Cross multiply
    158,349.54x = 218,514.57 × 86,729.88
  4. Step 4: Simplify right side
    158,349.54x = 18,951,742,434.35
  5. Step 5: Solve for x
    x = 18,951,742,434.35/158,349.54
  6. Step 6: Final answer
    x = 119,682.96

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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.