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Finding the Fourth Proportional to 220,788.48, 304,640.64 and 125,287.68

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Solution

The fourth proportional to 220,788.48, 304,640.64 and 125,287.68 is: 172,870.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,788.48 : 304,640.64 = 125,287.68 : x
  2. Step 2: Convert to fraction form
    220,788.48/304,640.64 = 125,287.68/x
  3. Step 3: Cross multiply
    220,788.48x = 304,640.64 × 125,287.68
  4. Step 4: Simplify right side
    220,788.48x = 38,167,719,019.32
  5. Step 5: Solve for x
    x = 38,167,719,019.32/220,788.48
  6. Step 6: Final answer
    x = 172,870.07

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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.