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Finding the Fourth Proportional to 84,609.20, 126,913.80 and 34,672.70

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Solution

The fourth proportional to 84,609.20, 126,913.80 and 34,672.70 is: 52,009.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,609.20 : 126,913.80 = 34,672.70 : x
  2. Step 2: Convert to fraction form
    84,609.20/126,913.80 = 34,672.70/x
  3. Step 3: Cross multiply
    84,609.20x = 126,913.80 × 34,672.70
  4. Step 4: Simplify right side
    84,609.20x = 4,400,444,113.26
  5. Step 5: Solve for x
    x = 4,400,444,113.26/84,609.20
  6. Step 6: Final answer
    x = 52,009.05

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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.