Home / 121,175.10-181,741.05-76,722.30

Finding the Fourth Proportional to 121,175.10, 181,741.05 and 76,722.30

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Solution

The fourth proportional to 121,175.10, 181,741.05 and 76,722.30 is: 115,069.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,175.10 : 181,741.05 = 76,722.30 : x
  2. Step 2: Convert to fraction form
    121,175.10/181,741.05 = 76,722.30/x
  3. Step 3: Cross multiply
    121,175.10x = 181,741.05 × 76,722.30
  4. Step 4: Simplify right side
    121,175.10x = 13,943,591,360.42
  5. Step 5: Solve for x
    x = 13,943,591,360.42/121,175.10
  6. Step 6: Final answer
    x = 115,069.77

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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.