Home / 121,451.40-181,948.68-81,939.60

Finding the Fourth Proportional to 121,451.40, 181,948.68 and 81,939.60

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Solution

The fourth proportional to 121,451.40, 181,948.68 and 81,939.60 is: 122,755.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,451.40 : 181,948.68 = 81,939.60 : x
  2. Step 2: Convert to fraction form
    121,451.40/181,948.68 = 81,939.60/x
  3. Step 3: Cross multiply
    121,451.40x = 181,948.68 × 81,939.60
  4. Step 4: Simplify right side
    121,451.40x = 14,908,802,059.73
  5. Step 5: Solve for x
    x = 14,908,802,059.73/121,451.40
  6. Step 6: Final answer
    x = 122,755.29

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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.