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Finding the Fourth Proportional to 120,567.20, 180,937.20 and 67,920.80

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Solution

The fourth proportional to 120,567.20, 180,937.20 and 67,920.80 is: 101,929.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,567.20 : 180,937.20 = 67,920.80 : x
  2. Step 2: Convert to fraction form
    120,567.20/180,937.20 = 67,920.80/x
  3. Step 3: Cross multiply
    120,567.20x = 180,937.20 × 67,920.80
  4. Step 4: Simplify right side
    120,567.20x = 12,289,399,373.76
  5. Step 5: Solve for x
    x = 12,289,399,373.76/120,567.20
  6. Step 6: Final answer
    x = 101,929.87

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1.5x scale

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.