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Finding the Fourth Proportional to 125,884.80, 188,827.20 and 115,387.20

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Solution

The fourth proportional to 125,884.80, 188,827.20 and 115,387.20 is: 173,080.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,884.80 : 188,827.20 = 115,387.20 : x
  2. Step 2: Convert to fraction form
    125,884.80/188,827.20 = 115,387.20/x
  3. Step 3: Cross multiply
    125,884.80x = 188,827.20 × 115,387.20
  4. Step 4: Simplify right side
    125,884.80x = 21,788,241,891.84
  5. Step 5: Solve for x
    x = 21,788,241,891.84/125,884.80
  6. Step 6: Final answer
    x = 173,080.80

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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.