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Finding the Fourth Proportional to 125,575.31, 188,358.09 and 42,469.31

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Solution

The fourth proportional to 125,575.31, 188,358.09 and 42,469.31 is: 63,702.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,575.31 : 188,358.09 = 42,469.31 : x
  2. Step 2: Convert to fraction form
    125,575.31/188,358.09 = 42,469.31/x
  3. Step 3: Cross multiply
    125,575.31x = 188,358.09 × 42,469.31
  4. Step 4: Simplify right side
    125,575.31x = 7,999,437,173.43
  5. Step 5: Solve for x
    x = 7,999,437,173.43/125,575.31
  6. Step 6: Final answer
    x = 63,702.31

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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.