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Finding the Fourth Proportional to 158,471.19, 218,692.17 and 86,849.69

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Solution

The fourth proportional to 158,471.19, 218,692.17 and 86,849.69 is: 119,853.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,471.19 : 218,692.17 = 86,849.69 : x
  2. Step 2: Convert to fraction form
    158,471.19/218,692.17 = 86,849.69/x
  3. Step 3: Cross multiply
    158,471.19x = 218,692.17 × 86,849.69
  4. Step 4: Simplify right side
    158,471.19x = 18,993,346,076.47
  5. Step 5: Solve for x
    x = 18,993,346,076.47/158,471.19
  6. Step 6: Final answer
    x = 119,853.62

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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.