Home / 121,154.10-181,731.15-74,433.30

Finding the Fourth Proportional to 121,154.10, 181,731.15 and 74,433.30

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Solution

The fourth proportional to 121,154.10, 181,731.15 and 74,433.30 is: 111,649.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,154.10 : 181,731.15 = 74,433.30 : x
  2. Step 2: Convert to fraction form
    121,154.10/181,731.15 = 74,433.30/x
  3. Step 3: Cross multiply
    121,154.10x = 181,731.15 × 74,433.30
  4. Step 4: Simplify right side
    121,154.10x = 13,526,849,207.30
  5. Step 5: Solve for x
    x = 13,526,849,207.30/121,154.10
  6. Step 6: Final answer
    x = 111,649.95

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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.