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Finding the Fourth Proportional to 127,868.60, 191,900.82 and 90,347.96

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Solution

The fourth proportional to 127,868.60, 191,900.82 and 90,347.96 is: 135,591.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,868.60 : 191,900.82 = 90,347.96 : x
  2. Step 2: Convert to fraction form
    127,868.60/191,900.82 = 90,347.96/x
  3. Step 3: Cross multiply
    127,868.60x = 191,900.82 × 90,347.96
  4. Step 4: Simplify right side
    127,868.60x = 17,337,847,609.33
  5. Step 5: Solve for x
    x = 17,337,847,609.33/127,868.60
  6. Step 6: Final answer
    x = 135,591.13

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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.