Home / 121,008.78-181,498.59-42,116.40

Finding the Fourth Proportional to 121,008.78, 181,498.59 and 42,116.40

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Solution

The fourth proportional to 121,008.78, 181,498.59 and 42,116.40 is: 63,169.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,008.78 : 181,498.59 = 42,116.40 : x
  2. Step 2: Convert to fraction form
    121,008.78/181,498.59 = 42,116.40/x
  3. Step 3: Cross multiply
    121,008.78x = 181,498.59 × 42,116.40
  4. Step 4: Simplify right side
    121,008.78x = 7,644,067,215.88
  5. Step 5: Solve for x
    x = 7,644,067,215.88/121,008.78
  6. Step 6: Final answer
    x = 63,169.53

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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.