Home / 60,311.20-90,445.12-20,857.60

Finding the Fourth Proportional to 60,311.20, 90,445.12 and 20,857.60

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Solution

The fourth proportional to 60,311.20, 90,445.12 and 20,857.60 is: 31,278.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,311.20 : 90,445.12 = 20,857.60 : x
  2. Step 2: Convert to fraction form
    60,311.20/90,445.12 = 20,857.60/x
  3. Step 3: Cross multiply
    60,311.20x = 90,445.12 × 20,857.60
  4. Step 4: Simplify right side
    60,311.20x = 1,886,468,134.91
  5. Step 5: Solve for x
    x = 1,886,468,134.91/60,311.20
  6. Step 6: Final answer
    x = 31,278.90

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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.