Home / 121,029.20-181,111.80-76,677.20

Finding the Fourth Proportional to 121,029.20, 181,111.80 and 76,677.20

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Solution

The fourth proportional to 121,029.20, 181,111.80 and 76,677.20 is: 114,742.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,029.20 : 181,111.80 = 76,677.20 : x
  2. Step 2: Convert to fraction form
    121,029.20/181,111.80 = 76,677.20/x
  3. Step 3: Cross multiply
    121,029.20x = 181,111.80 × 76,677.20
  4. Step 4: Simplify right side
    121,029.20x = 13,887,145,710.96
  5. Step 5: Solve for x
    x = 13,887,145,710.96/121,029.20
  6. Step 6: Final answer
    x = 114,742.11

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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.