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Finding the Fourth Proportional to 245,575.84, 338,891.28 and 138,145.84

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Solution

The fourth proportional to 245,575.84, 338,891.28 and 138,145.84 is: 190,639.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,575.84 : 338,891.28 = 138,145.84 : x
  2. Step 2: Convert to fraction form
    245,575.84/338,891.28 = 138,145.84/x
  3. Step 3: Cross multiply
    245,575.84x = 338,891.28 × 138,145.84
  4. Step 4: Simplify right side
    245,575.84x = 46,816,420,544.28
  5. Step 5: Solve for x
    x = 46,816,420,544.28/245,575.84
  6. Step 6: Final answer
    x = 190,639.36

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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.