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Finding the Fourth Proportional to 158,244.42, 218,377.90 and 86,631.11

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Solution

The fourth proportional to 158,244.42, 218,377.90 and 86,631.11 is: 119,551.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,244.42 : 218,377.90 = 86,631.11 : x
  2. Step 2: Convert to fraction form
    158,244.42/218,377.90 = 86,631.11/x
  3. Step 3: Cross multiply
    158,244.42x = 218,377.90 × 86,631.11
  4. Step 4: Simplify right side
    158,244.42x = 18,918,319,161.04
  5. Step 5: Solve for x
    x = 18,918,319,161.04/158,244.42
  6. Step 6: Final answer
    x = 119,551.25

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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.