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Finding the Fourth Proportional to 125,620.97, 188,325.47 and 54,490.05

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Solution

The fourth proportional to 125,620.97, 188,325.47 and 54,490.05 is: 81,689.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,620.97 : 188,325.47 = 54,490.05 : x
  2. Step 2: Convert to fraction form
    125,620.97/188,325.47 = 54,490.05/x
  3. Step 3: Cross multiply
    125,620.97x = 188,325.47 × 54,490.05
  4. Step 4: Simplify right side
    125,620.97x = 10,261,864,276.57
  5. Step 5: Solve for x
    x = 10,261,864,276.57/125,620.97
  6. Step 6: Final answer
    x = 81,689.11

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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.