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Finding the Fourth Proportional to 158,479.92, 218,692.36 and 86,854.86

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Solution

The fourth proportional to 158,479.92, 218,692.36 and 86,854.86 is: 119,854.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,479.92 : 218,692.36 = 86,854.86 : x
  2. Step 2: Convert to fraction form
    158,479.92/218,692.36 = 86,854.86/x
  3. Step 3: Cross multiply
    158,479.92x = 218,692.36 × 86,854.86
  4. Step 4: Simplify right side
    158,479.92x = 18,994,494,310.87
  5. Step 5: Solve for x
    x = 18,994,494,310.87/158,479.92
  6. Step 6: Final answer
    x = 119,854.26

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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.