Home / 120,165.85-180,233.11-31,426.20

Finding the Fourth Proportional to 120,165.85, 180,233.11 and 31,426.20

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Solution

The fourth proportional to 120,165.85, 180,233.11 and 31,426.20 is: 47,135.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,165.85 : 180,233.11 = 31,426.20 : x
  2. Step 2: Convert to fraction form
    120,165.85/180,233.11 = 31,426.20/x
  3. Step 3: Cross multiply
    120,165.85x = 180,233.11 × 31,426.20
  4. Step 4: Simplify right side
    120,165.85x = 5,664,041,761.48
  5. Step 5: Solve for x
    x = 5,664,041,761.48/120,165.85
  6. Step 6: Final answer
    x = 47,135.20

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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.