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Finding the Fourth Proportional to 121,284.80, 181,927.20 and 68,140.70

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Solution

The fourth proportional to 121,284.80, 181,927.20 and 68,140.70 is: 102,211.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,284.80 : 181,927.20 = 68,140.70 : x
  2. Step 2: Convert to fraction form
    121,284.80/181,927.20 = 68,140.70/x
  3. Step 3: Cross multiply
    121,284.80x = 181,927.20 × 68,140.70
  4. Step 4: Simplify right side
    121,284.80x = 12,396,646,757.04
  5. Step 5: Solve for x
    x = 12,396,646,757.04/121,284.80
  6. Step 6: Final answer
    x = 102,211.05

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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.