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Finding the Fourth Proportional to 84,312.70, 126,469.05 and 25,189.89

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Solution

The fourth proportional to 84,312.70, 126,469.05 and 25,189.89 is: 37,784.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,312.70 : 126,469.05 = 25,189.89 : x
  2. Step 2: Convert to fraction form
    84,312.70/126,469.05 = 25,189.89/x
  3. Step 3: Cross multiply
    84,312.70x = 126,469.05 × 25,189.89
  4. Step 4: Simplify right side
    84,312.70x = 3,185,740,889.18
  5. Step 5: Solve for x
    x = 3,185,740,889.18/84,312.70
  6. Step 6: Final answer
    x = 37,784.83

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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.