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Finding the Fourth Proportional to 84,388.93, 126,508.89 and 31,835.32

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Solution

The fourth proportional to 84,388.93, 126,508.89 and 31,835.32 is: 47,724.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,388.93 : 126,508.89 = 31,835.32 : x
  2. Step 2: Convert to fraction form
    84,388.93/126,508.89 = 31,835.32/x
  3. Step 3: Cross multiply
    84,388.93x = 126,508.89 × 31,835.32
  4. Step 4: Simplify right side
    84,388.93x = 4,027,450,363.45
  5. Step 5: Solve for x
    x = 4,027,450,363.45/84,388.93
  6. Step 6: Final answer
    x = 47,724.87

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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.