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Finding the Fourth Proportional to 80,585.28, 120,900.60 and 28,000.08

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Solution

The fourth proportional to 80,585.28, 120,900.60 and 28,000.08 is: 42,008.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,585.28 : 120,900.60 = 28,000.08 : x
  2. Step 2: Convert to fraction form
    80,585.28/120,900.60 = 28,000.08/x
  3. Step 3: Cross multiply
    80,585.28x = 120,900.60 × 28,000.08
  4. Step 4: Simplify right side
    80,585.28x = 3,385,226,472.05
  5. Step 5: Solve for x
    x = 3,385,226,472.05/80,585.28
  6. Step 6: Final answer
    x = 42,008.00

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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.