Home / 121,100.13-181,589.45-76,815.81

Finding the Fourth Proportional to 121,100.13, 181,589.45 and 76,815.81

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Solution

The fourth proportional to 121,100.13, 181,589.45 and 76,815.81 is: 115,185.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,100.13 : 181,589.45 = 76,815.81 : x
  2. Step 2: Convert to fraction form
    121,100.13/181,589.45 = 76,815.81/x
  3. Step 3: Cross multiply
    121,100.13x = 181,589.45 × 76,815.81
  4. Step 4: Simplify right side
    121,100.13x = 13,948,940,305.13
  5. Step 5: Solve for x
    x = 13,948,940,305.13/121,100.13
  6. Step 6: Final answer
    x = 115,185.18

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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.