Home / 81,306.24-121,959.50-53,402.55

Finding the Fourth Proportional to 81,306.24, 121,959.50 and 53,402.55

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Solution

The fourth proportional to 81,306.24, 121,959.50 and 53,402.55 is: 80,103.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,306.24 : 121,959.50 = 53,402.55 : x
  2. Step 2: Convert to fraction form
    81,306.24/121,959.50 = 53,402.55/x
  3. Step 3: Cross multiply
    81,306.24x = 121,959.50 × 53,402.55
  4. Step 4: Simplify right side
    81,306.24x = 6,512,948,029.71
  5. Step 5: Solve for x
    x = 6,512,948,029.71/81,306.24
  6. Step 6: Final answer
    x = 80,103.91

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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.