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Finding the Fourth Proportional to 121,515.80, 181,884.90 and 112,184.60

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Solution

The fourth proportional to 121,515.80, 181,884.90 and 112,184.60 is: 167,917.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,515.80 : 181,884.90 = 112,184.60 : x
  2. Step 2: Convert to fraction form
    121,515.80/181,884.90 = 112,184.60/x
  3. Step 3: Cross multiply
    121,515.80x = 181,884.90 × 112,184.60
  4. Step 4: Simplify right side
    121,515.80x = 20,404,684,752.54
  5. Step 5: Solve for x
    x = 20,404,684,752.54/121,515.80
  6. Step 6: Final answer
    x = 167,917.96

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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.