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Finding the Fourth Proportional to 84,398.70, 126,604.73 and 28,239.11

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Solution

The fourth proportional to 84,398.70, 126,604.73 and 28,239.11 is: 42,360.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,398.70 : 126,604.73 = 28,239.11 : x
  2. Step 2: Convert to fraction form
    84,398.70/126,604.73 = 28,239.11/x
  3. Step 3: Cross multiply
    84,398.70x = 126,604.73 × 28,239.11
  4. Step 4: Simplify right side
    84,398.70x = 3,575,204,334.56
  5. Step 5: Solve for x
    x = 3,575,204,334.56/84,398.70
  6. Step 6: Final answer
    x = 42,360.89

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1.5x scale

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.