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Finding the Fourth Proportional to 248,491.38, 342,910.49 and 138,109.65

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Solution

The fourth proportional to 248,491.38, 342,910.49 and 138,109.65 is: 190,587.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,491.38 : 342,910.49 = 138,109.65 : x
  2. Step 2: Convert to fraction form
    248,491.38/342,910.49 = 138,109.65/x
  3. Step 3: Cross multiply
    248,491.38x = 342,910.49 × 138,109.65
  4. Step 4: Simplify right side
    248,491.38x = 47,359,247,755.23
  5. Step 5: Solve for x
    x = 47,359,247,755.23/248,491.38
  6. Step 6: Final answer
    x = 190,587.08

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1.5x scale

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.