Home / 121,277.70-181,722.15-76,824.90

Finding the Fourth Proportional to 121,277.70, 181,722.15 and 76,824.90

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Solution

The fourth proportional to 121,277.70, 181,722.15 and 76,824.90 is: 115,114.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,277.70 : 181,722.15 = 76,824.90 : x
  2. Step 2: Convert to fraction form
    121,277.70/181,722.15 = 76,824.90/x
  3. Step 3: Cross multiply
    121,277.70x = 181,722.15 × 76,824.90
  4. Step 4: Simplify right side
    121,277.70x = 13,960,786,001.54
  5. Step 5: Solve for x
    x = 13,960,786,001.54/121,277.70
  6. Step 6: Final answer
    x = 115,114.20

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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.