Home / 121,311.10-181,966.65-111,979.90

Finding the Fourth Proportional to 121,311.10, 181,966.65 and 111,979.90

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Solution

The fourth proportional to 121,311.10, 181,966.65 and 111,979.90 is: 167,969.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,311.10 : 181,966.65 = 111,979.90 : x
  2. Step 2: Convert to fraction form
    121,311.10/181,966.65 = 111,979.90/x
  3. Step 3: Cross multiply
    121,311.10x = 181,966.65 × 111,979.90
  4. Step 4: Simplify right side
    121,311.10x = 20,376,607,270.34
  5. Step 5: Solve for x
    x = 20,376,607,270.34/121,311.10
  6. Step 6: Final answer
    x = 167,969.85

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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.