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Finding the Fourth Proportional to 80,122.81, 120,014.69 and 51,959.20

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Solution

The fourth proportional to 80,122.81, 120,014.69 and 51,959.20 is: 77,828.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,122.81 : 120,014.69 = 51,959.20 : x
  2. Step 2: Convert to fraction form
    80,122.81/120,014.69 = 51,959.20/x
  3. Step 3: Cross multiply
    80,122.81x = 120,014.69 × 51,959.20
  4. Step 4: Simplify right side
    80,122.81x = 6,235,867,280.65
  5. Step 5: Solve for x
    x = 6,235,867,280.65/80,122.81
  6. Step 6: Final answer
    x = 77,828.86

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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.