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Finding the Fourth Proportional to 425,346.56, 638,144.40 and 125,835.08

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Solution

The fourth proportional to 425,346.56, 638,144.40 and 125,835.08 is: 188,789.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,346.56 : 638,144.40 = 125,835.08 : x
  2. Step 2: Convert to fraction form
    425,346.56/638,144.40 = 125,835.08/x
  3. Step 3: Cross multiply
    425,346.56x = 638,144.40 × 125,835.08
  4. Step 4: Simplify right side
    425,346.56x = 80,300,951,625.55
  5. Step 5: Solve for x
    x = 80,300,951,625.55/425,346.56
  6. Step 6: Final answer
    x = 188,789.47

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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.