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Finding the Fourth Proportional to 92,488.80, 138,733.20 and 82,639.20

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Solution

The fourth proportional to 92,488.80, 138,733.20 and 82,639.20 is: 123,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,488.80 : 138,733.20 = 82,639.20 : x
  2. Step 2: Convert to fraction form
    92,488.80/138,733.20 = 82,639.20/x
  3. Step 3: Cross multiply
    92,488.80x = 138,733.20 × 82,639.20
  4. Step 4: Simplify right side
    92,488.80x = 11,464,800,661.44
  5. Step 5: Solve for x
    x = 11,464,800,661.44/92,488.80
  6. Step 6: Final answer
    x = 123,958.80

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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.