Home / 84,301.13-126,448.72-21,121.79

Finding the Fourth Proportional to 84,301.13, 126,448.72 and 21,121.79

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Solution

The fourth proportional to 84,301.13, 126,448.72 and 21,121.79 is: 31,681.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,301.13 : 126,448.72 = 21,121.79 : x
  2. Step 2: Convert to fraction form
    84,301.13/126,448.72 = 21,121.79/x
  3. Step 3: Cross multiply
    84,301.13x = 126,448.72 × 21,121.79
  4. Step 4: Simplify right side
    84,301.13x = 2,670,822,624.56
  5. Step 5: Solve for x
    x = 2,670,822,624.56/84,301.13
  6. Step 6: Final answer
    x = 31,681.93

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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.