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Finding the Fourth Proportional to 245,624.80, 338,974.32 and 138,189.28

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Solution

The fourth proportional to 245,624.80, 338,974.32 and 138,189.28 is: 190,708.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,624.80 : 338,974.32 = 138,189.28 : x
  2. Step 2: Convert to fraction form
    245,624.80/338,974.32 = 138,189.28/x
  3. Step 3: Cross multiply
    245,624.80x = 338,974.32 × 138,189.28
  4. Step 4: Simplify right side
    245,624.80x = 46,842,617,219.29
  5. Step 5: Solve for x
    x = 46,842,617,219.29/245,624.80
  6. Step 6: Final answer
    x = 190,708.01

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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.