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Finding the Fourth Proportional to 84,909.72, 127,356.76 and 28,743.41

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Solution

The fourth proportional to 84,909.72, 127,356.76 and 28,743.41 is: 43,112.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,909.72 : 127,356.76 = 28,743.41 : x
  2. Step 2: Convert to fraction form
    84,909.72/127,356.76 = 28,743.41/x
  3. Step 3: Cross multiply
    84,909.72x = 127,356.76 × 28,743.41
  4. Step 4: Simplify right side
    84,909.72x = 3,660,667,045.21
  5. Step 5: Solve for x
    x = 3,660,667,045.21/84,909.72
  6. Step 6: Final answer
    x = 43,112.46

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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.