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Finding the Fourth Proportional to 125,657.56, 188,486.34 and 42,609.88

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Solution

The fourth proportional to 125,657.56, 188,486.34 and 42,609.88 is: 63,914.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,657.56 : 188,486.34 = 42,609.88 : x
  2. Step 2: Convert to fraction form
    125,657.56/188,486.34 = 42,609.88/x
  3. Step 3: Cross multiply
    125,657.56x = 188,486.34 × 42,609.88
  4. Step 4: Simplify right side
    125,657.56x = 8,031,380,329.04
  5. Step 5: Solve for x
    x = 8,031,380,329.04/125,657.56
  6. Step 6: Final answer
    x = 63,914.82

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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.