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Finding the Fourth Proportional to 120,078.59, 179,970.25 and 67,377.35

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Solution

The fourth proportional to 120,078.59, 179,970.25 and 67,377.35 is: 100,983.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,078.59 : 179,970.25 = 67,377.35 : x
  2. Step 2: Convert to fraction form
    120,078.59/179,970.25 = 67,377.35/x
  3. Step 3: Cross multiply
    120,078.59x = 179,970.25 × 67,377.35
  4. Step 4: Simplify right side
    120,078.59x = 12,125,918,523.84
  5. Step 5: Solve for x
    x = 12,125,918,523.84/120,078.59
  6. Step 6: Final answer
    x = 100,983.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.