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Finding the Fourth Proportional to 245,594.78, 338,920.28 and 138,164.90

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Solution

The fourth proportional to 245,594.78, 338,920.28 and 138,164.90 is: 190,667.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,594.78 : 338,920.28 = 138,164.90 : x
  2. Step 2: Convert to fraction form
    245,594.78/338,920.28 = 138,164.90/x
  3. Step 3: Cross multiply
    245,594.78x = 338,920.28 × 138,164.90
  4. Step 4: Simplify right side
    245,594.78x = 46,826,886,594.17
  5. Step 5: Solve for x
    x = 46,826,886,594.17/245,594.78
  6. Step 6: Final answer
    x = 190,667.27

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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.