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Finding the Fourth Proportional to 80,818.28, 120,889.81 and 56,800.90

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Solution

The fourth proportional to 80,818.28, 120,889.81 and 56,800.90 is: 84,964.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,818.28 : 120,889.81 = 56,800.90 : x
  2. Step 2: Convert to fraction form
    80,818.28/120,889.81 = 56,800.90/x
  3. Step 3: Cross multiply
    80,818.28x = 120,889.81 × 56,800.90
  4. Step 4: Simplify right side
    80,818.28x = 6,866,650,008.83
  5. Step 5: Solve for x
    x = 6,866,650,008.83/80,818.28
  6. Step 6: Final answer
    x = 84,964.07

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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.