Home / 245,282.78-338,518.20-136,397.90

Finding the Fourth Proportional to 245,282.78, 338,518.20 and 136,397.90

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Solution

The fourth proportional to 245,282.78, 338,518.20 and 136,397.90 is: 188,244.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,282.78 : 338,518.20 = 136,397.90 : x
  2. Step 2: Convert to fraction form
    245,282.78/338,518.20 = 136,397.90/x
  3. Step 3: Cross multiply
    245,282.78x = 338,518.20 × 136,397.90
  4. Step 4: Simplify right side
    245,282.78x = 46,173,171,591.78
  5. Step 5: Solve for x
    x = 46,173,171,591.78/245,282.78
  6. Step 6: Final answer
    x = 188,244.65

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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.