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Finding the Fourth Proportional to 120,630.90, 180,947.65 and 36,391.79

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Solution

The fourth proportional to 120,630.90, 180,947.65 and 36,391.79 is: 54,588.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,630.90 : 180,947.65 = 36,391.79 : x
  2. Step 2: Convert to fraction form
    120,630.90/180,947.65 = 36,391.79/x
  3. Step 3: Cross multiply
    120,630.90x = 180,947.65 × 36,391.79
  4. Step 4: Simplify right side
    120,630.90x = 6,585,008,879.79
  5. Step 5: Solve for x
    x = 6,585,008,879.79/120,630.90
  6. Step 6: Final answer
    x = 54,588.08

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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.