Home / 87,681.42-121,012.11-49,448.79

Finding the Fourth Proportional to 87,681.42, 121,012.11 and 49,448.79

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Solution

The fourth proportional to 87,681.42, 121,012.11 and 49,448.79 is: 68,245.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,681.42 : 121,012.11 = 49,448.79 : x
  2. Step 2: Convert to fraction form
    87,681.42/121,012.11 = 49,448.79/x
  3. Step 3: Cross multiply
    87,681.42x = 121,012.11 × 49,448.79
  4. Step 4: Simplify right side
    87,681.42x = 5,983,902,414.85
  5. Step 5: Solve for x
    x = 5,983,902,414.85/87,681.42
  6. Step 6: Final answer
    x = 68,245.96

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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.