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Finding the Fourth Proportional to 220,291.72, 304,017.61 and 124,799.20

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Solution

The fourth proportional to 220,291.72, 304,017.61 and 124,799.20 is: 172,231.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,291.72 : 304,017.61 = 124,799.20 : x
  2. Step 2: Convert to fraction form
    220,291.72/304,017.61 = 124,799.20/x
  3. Step 3: Cross multiply
    220,291.72x = 304,017.61 × 124,799.20
  4. Step 4: Simplify right side
    220,291.72x = 37,941,153,441.87
  5. Step 5: Solve for x
    x = 37,941,153,441.87/220,291.72
  6. Step 6: Final answer
    x = 172,231.41

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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.