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Finding the Fourth Proportional to 92,728.86, 127,869.57 and 79,344.42

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Solution

The fourth proportional to 92,728.86, 127,869.57 and 79,344.42 is: 109,412.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,728.86 : 127,869.57 = 79,344.42 : x
  2. Step 2: Convert to fraction form
    92,728.86/127,869.57 = 79,344.42/x
  3. Step 3: Cross multiply
    92,728.86x = 127,869.57 × 79,344.42
  4. Step 4: Simplify right side
    92,728.86x = 10,145,736,867.30
  5. Step 5: Solve for x
    x = 10,145,736,867.30/92,728.86
  6. Step 6: Final answer
    x = 109,412.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.