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Finding the Fourth Proportional to 158,427.96, 218,630.46 and 86,812.44

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Solution

The fourth proportional to 158,427.96, 218,630.46 and 86,812.44 is: 119,801.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,427.96 : 218,630.46 = 86,812.44 : x
  2. Step 2: Convert to fraction form
    158,427.96/218,630.46 = 86,812.44/x
  3. Step 3: Cross multiply
    158,427.96x = 218,630.46 × 86,812.44
  4. Step 4: Simplify right side
    158,427.96x = 18,979,843,690.92
  5. Step 5: Solve for x
    x = 18,979,843,690.92/158,427.96
  6. Step 6: Final answer
    x = 119,801.10

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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.