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Finding the Fourth Proportional to 125,602.80, 188,112.60 and 85,945.20

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Solution

The fourth proportional to 125,602.80, 188,112.60 and 85,945.20 is: 128,718.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,602.80 : 188,112.60 = 85,945.20 : x
  2. Step 2: Convert to fraction form
    125,602.80/188,112.60 = 85,945.20/x
  3. Step 3: Cross multiply
    125,602.80x = 188,112.60 × 85,945.20
  4. Step 4: Simplify right side
    125,602.80x = 16,167,375,029.52
  5. Step 5: Solve for x
    x = 16,167,375,029.52/125,602.80
  6. Step 6: Final answer
    x = 128,718.27

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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.