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Finding the Fourth Proportional to 380,687.76, 571,066.86 and 124,521.78

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Solution

The fourth proportional to 380,687.76, 571,066.86 and 124,521.78 is: 186,794.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,687.76 : 571,066.86 = 124,521.78 : x
  2. Step 2: Convert to fraction form
    380,687.76/571,066.86 = 124,521.78/x
  3. Step 3: Cross multiply
    380,687.76x = 571,066.86 × 124,521.78
  4. Step 4: Simplify right side
    380,687.76x = 71,110,261,906.21
  5. Step 5: Solve for x
    x = 71,110,261,906.21/380,687.76
  6. Step 6: Final answer
    x = 186,794.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.