Home / 80,779.20-121,122.40-34,064.80

Finding the Fourth Proportional to 80,779.20, 121,122.40 and 34,064.80

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Solution

The fourth proportional to 80,779.20, 121,122.40 and 34,064.80 is: 51,077.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,779.20 : 121,122.40 = 34,064.80 : x
  2. Step 2: Convert to fraction form
    80,779.20/121,122.40 = 34,064.80/x
  3. Step 3: Cross multiply
    80,779.20x = 121,122.40 × 34,064.80
  4. Step 4: Simplify right side
    80,779.20x = 4,126,010,331.52
  5. Step 5: Solve for x
    x = 4,126,010,331.52/80,779.20
  6. Step 6: Final answer
    x = 51,077.63

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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.