Home / 81,050.20-121,502.40-51,452.80

Finding the Fourth Proportional to 81,050.20, 121,502.40 and 51,452.80

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Solution

The fourth proportional to 81,050.20, 121,502.40 and 51,452.80 is: 77,132.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,050.20 : 121,502.40 = 51,452.80 : x
  2. Step 2: Convert to fraction form
    81,050.20/121,502.40 = 51,452.80/x
  3. Step 3: Cross multiply
    81,050.20x = 121,502.40 × 51,452.80
  4. Step 4: Simplify right side
    81,050.20x = 6,251,638,686.72
  5. Step 5: Solve for x
    x = 6,251,638,686.72/81,050.20
  6. Step 6: Final answer
    x = 77,132.92

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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.