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Finding the Fourth Proportional to 92,298.78, 137,942.37 and 67,391.28

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Solution

The fourth proportional to 92,298.78, 137,942.37 and 67,391.28 is: 100,717.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,298.78 : 137,942.37 = 67,391.28 : x
  2. Step 2: Convert to fraction form
    92,298.78/137,942.37 = 67,391.28/x
  3. Step 3: Cross multiply
    92,298.78x = 137,942.37 × 67,391.28
  4. Step 4: Simplify right side
    92,298.78x = 9,296,112,880.53
  5. Step 5: Solve for x
    x = 9,296,112,880.53/92,298.78
  6. Step 6: Final answer
    x = 100,717.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.