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Finding the Fourth Proportional to 92,039.54, 138,073.15 and 28,845.61

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Solution

The fourth proportional to 92,039.54, 138,073.15 and 28,845.61 is: 43,272.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,039.54 : 138,073.15 = 28,845.61 : x
  2. Step 2: Convert to fraction form
    92,039.54/138,073.15 = 28,845.61/x
  3. Step 3: Cross multiply
    92,039.54x = 138,073.15 × 28,845.61
  4. Step 4: Simplify right side
    92,039.54x = 3,982,803,927.25
  5. Step 5: Solve for x
    x = 3,982,803,927.25/92,039.54
  6. Step 6: Final answer
    x = 43,272.75

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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.