Home / 90,636.60-135,982.05-31,472.58

Finding the Fourth Proportional to 90,636.60, 135,982.05 and 31,472.58

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Solution

The fourth proportional to 90,636.60, 135,982.05 and 31,472.58 is: 47,218.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,636.60 : 135,982.05 = 31,472.58 : x
  2. Step 2: Convert to fraction form
    90,636.60/135,982.05 = 31,472.58/x
  3. Step 3: Cross multiply
    90,636.60x = 135,982.05 × 31,472.58
  4. Step 4: Simplify right side
    90,636.60x = 4,279,705,947.19
  5. Step 5: Solve for x
    x = 4,279,705,947.19/90,636.60
  6. Step 6: Final answer
    x = 47,218.30

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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.