Home / 121,299.84-167,463.24-81,081.72

Finding the Fourth Proportional to 121,299.84, 167,463.24 and 81,081.72

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Solution

The fourth proportional to 121,299.84, 167,463.24 and 81,081.72 is: 111,939.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,299.84 : 167,463.24 = 81,081.72 : x
  2. Step 2: Convert to fraction form
    121,299.84/167,463.24 = 81,081.72/x
  3. Step 3: Cross multiply
    121,299.84x = 167,463.24 × 81,081.72
  4. Step 4: Simplify right side
    121,299.84x = 13,578,207,535.97
  5. Step 5: Solve for x
    x = 13,578,207,535.97/121,299.84
  6. Step 6: Final answer
    x = 111,939.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.