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Finding the Fourth Proportional to 121,107.60, 181,488.60 and 89,269.20

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Solution

The fourth proportional to 121,107.60, 181,488.60 and 89,269.20 is: 133,776.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,107.60 : 181,488.60 = 89,269.20 : x
  2. Step 2: Convert to fraction form
    121,107.60/181,488.60 = 89,269.20/x
  3. Step 3: Cross multiply
    121,107.60x = 181,488.60 × 89,269.20
  4. Step 4: Simplify right side
    121,107.60x = 16,201,342,131.12
  5. Step 5: Solve for x
    x = 16,201,342,131.12/121,107.60
  6. Step 6: Final answer
    x = 133,776.43

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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.