Home / 121,176.40-181,764.60-76,853.20

Finding the Fourth Proportional to 121,176.40, 181,764.60 and 76,853.20

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Solution

The fourth proportional to 121,176.40, 181,764.60 and 76,853.20 is: 115,279.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,176.40 : 181,764.60 = 76,853.20 : x
  2. Step 2: Convert to fraction form
    121,176.40/181,764.60 = 76,853.20/x
  3. Step 3: Cross multiply
    121,176.40x = 181,764.60 × 76,853.20
  4. Step 4: Simplify right side
    121,176.40x = 13,969,191,156.72
  5. Step 5: Solve for x
    x = 13,969,191,156.72/121,176.40
  6. Step 6: Final answer
    x = 115,279.80

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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.