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Finding the Fourth Proportional to 84,672.90, 126,963.98 and 28,494.34

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Solution

The fourth proportional to 84,672.90, 126,963.98 and 28,494.34 is: 42,726.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,672.90 : 126,963.98 = 28,494.34 : x
  2. Step 2: Convert to fraction form
    84,672.90/126,963.98 = 28,494.34/x
  3. Step 3: Cross multiply
    84,672.90x = 126,963.98 × 28,494.34
  4. Step 4: Simplify right side
    84,672.90x = 3,617,754,813.87
  5. Step 5: Solve for x
    x = 3,617,754,813.87/84,672.90
  6. Step 6: Final answer
    x = 42,726.24

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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.