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Finding the Fourth Proportional to 125,640.30, 173,358.90 and 74,668.62

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Solution

The fourth proportional to 125,640.30, 173,358.90 and 74,668.62 is: 103,028.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,640.30 : 173,358.90 = 74,668.62 : x
  2. Step 2: Convert to fraction form
    125,640.30/173,358.90 = 74,668.62/x
  3. Step 3: Cross multiply
    125,640.30x = 173,358.90 × 74,668.62
  4. Step 4: Simplify right side
    125,640.30x = 12,944,469,827.72
  5. Step 5: Solve for x
    x = 12,944,469,827.72/125,640.30
  6. Step 6: Final answer
    x = 103,028.01

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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.