Home / 121,379.20-181,874.40-76,926.40

Finding the Fourth Proportional to 121,379.20, 181,874.40 and 76,926.40

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Solution

The fourth proportional to 121,379.20, 181,874.40 and 76,926.40 is: 115,266.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,379.20 : 181,874.40 = 76,926.40 : x
  2. Step 2: Convert to fraction form
    121,379.20/181,874.40 = 76,926.40/x
  3. Step 3: Cross multiply
    121,379.20x = 181,874.40 × 76,926.40
  4. Step 4: Simplify right side
    121,379.20x = 13,990,942,844.16
  5. Step 5: Solve for x
    x = 13,990,942,844.16/121,379.20
  6. Step 6: Final answer
    x = 115,266.40

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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.