Home / 80,785.35-121,152.51-74,782.04

Finding the Fourth Proportional to 80,785.35, 121,152.51 and 74,782.04

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Solution

The fourth proportional to 80,785.35, 121,152.51 and 74,782.04 is: 112,149.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,785.35 : 121,152.51 = 74,782.04 : x
  2. Step 2: Convert to fraction form
    80,785.35/121,152.51 = 74,782.04/x
  3. Step 3: Cross multiply
    80,785.35x = 121,152.51 × 74,782.04
  4. Step 4: Simplify right side
    80,785.35x = 9,060,031,243.16
  5. Step 5: Solve for x
    x = 9,060,031,243.16/80,785.35
  6. Step 6: Final answer
    x = 112,149.43

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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.