Home / 121,330.20-181,995.30-85,900.80

Finding the Fourth Proportional to 121,330.20, 181,995.30 and 85,900.80

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Solution

The fourth proportional to 121,330.20, 181,995.30 and 85,900.80 is: 128,851.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,330.20 : 181,995.30 = 85,900.80 : x
  2. Step 2: Convert to fraction form
    121,330.20/181,995.30 = 85,900.80/x
  3. Step 3: Cross multiply
    121,330.20x = 181,995.30 × 85,900.80
  4. Step 4: Simplify right side
    121,330.20x = 15,633,541,866.24
  5. Step 5: Solve for x
    x = 15,633,541,866.24/121,330.20
  6. Step 6: Final answer
    x = 128,851.20

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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.