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Finding the Fourth Proportional to 120,645.38, 180,991.65 and 36,412.40

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Solution

The fourth proportional to 120,645.38, 180,991.65 and 36,412.40 is: 54,625.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,645.38 : 180,991.65 = 36,412.40 : x
  2. Step 2: Convert to fraction form
    120,645.38/180,991.65 = 36,412.40/x
  3. Step 3: Cross multiply
    120,645.38x = 180,991.65 × 36,412.40
  4. Step 4: Simplify right side
    120,645.38x = 6,590,340,945.49
  5. Step 5: Solve for x
    x = 6,590,340,945.49/120,645.38
  6. Step 6: Final answer
    x = 54,625.72

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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.