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Finding the Fourth Proportional to 158,181.60, 218,290.61 and 86,561.65

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Solution

The fourth proportional to 158,181.60, 218,290.61 and 86,561.65 is: 119,455.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,181.60 : 218,290.61 = 86,561.65 : x
  2. Step 2: Convert to fraction form
    158,181.60/218,290.61 = 86,561.65/x
  3. Step 3: Cross multiply
    158,181.60x = 218,290.61 × 86,561.65
  4. Step 4: Simplify right side
    158,181.60x = 18,895,593,856.85
  5. Step 5: Solve for x
    x = 18,895,593,856.85/158,181.60
  6. Step 6: Final answer
    x = 119,455.07

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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.