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Finding the Fourth Proportional to 245,129.65, 338,242.08 and 137,679.10

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Solution

The fourth proportional to 245,129.65, 338,242.08 and 137,679.10 is: 189,976.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,129.65 : 338,242.08 = 137,679.10 : x
  2. Step 2: Convert to fraction form
    245,129.65/338,242.08 = 137,679.10/x
  3. Step 3: Cross multiply
    245,129.65x = 338,242.08 × 137,679.10
  4. Step 4: Simplify right side
    245,129.65x = 46,568,865,156.53
  5. Step 5: Solve for x
    x = 46,568,865,156.53/245,129.65
  6. Step 6: Final answer
    x = 189,976.47

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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.