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Finding the Fourth Proportional to 245,387.36, 338,626.72 and 137,961.92

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Solution

The fourth proportional to 245,387.36, 338,626.72 and 137,961.92 is: 190,383.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,387.36 : 338,626.72 = 137,961.92 : x
  2. Step 2: Convert to fraction form
    245,387.36/338,626.72 = 137,961.92/x
  3. Step 3: Cross multiply
    245,387.36x = 338,626.72 × 137,961.92
  4. Step 4: Simplify right side
    245,387.36x = 46,717,592,454.50
  5. Step 5: Solve for x
    x = 46,717,592,454.50/245,387.36
  6. Step 6: Final answer
    x = 190,383.04

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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.