Home / 120,766.20-180,566.10-89,273.40

Finding the Fourth Proportional to 120,766.20, 180,566.10 and 89,273.40

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Solution

The fourth proportional to 120,766.20, 180,566.10 and 89,273.40 is: 133,478.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,766.20 : 180,566.10 = 89,273.40 : x
  2. Step 2: Convert to fraction form
    120,766.20/180,566.10 = 89,273.40/x
  3. Step 3: Cross multiply
    120,766.20x = 180,566.10 × 89,273.40
  4. Step 4: Simplify right side
    120,766.20x = 16,119,749,671.74
  5. Step 5: Solve for x
    x = 16,119,749,671.74/120,766.20
  6. Step 6: Final answer
    x = 133,478.98

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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.