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Finding the Fourth Proportional to 158,366.70, 218,546.10 and 86,749.30

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Solution

The fourth proportional to 158,366.70, 218,546.10 and 86,749.30 is: 119,714.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,366.70 : 218,546.10 = 86,749.30 : x
  2. Step 2: Convert to fraction form
    158,366.70/218,546.10 = 86,749.30/x
  3. Step 3: Cross multiply
    158,366.70x = 218,546.10 × 86,749.30
  4. Step 4: Simplify right side
    158,366.70x = 18,958,721,192.73
  5. Step 5: Solve for x
    x = 18,958,721,192.73/158,366.70
  6. Step 6: Final answer
    x = 119,714.06

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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.