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Finding the Fourth Proportional to 258,181.74, 387,138.95 and 115,904.52

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Solution

The fourth proportional to 258,181.74, 387,138.95 and 115,904.52 is: 173,796.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,181.74 : 387,138.95 = 115,904.52 : x
  2. Step 2: Convert to fraction form
    258,181.74/387,138.95 = 115,904.52/x
  3. Step 3: Cross multiply
    258,181.74x = 387,138.95 × 115,904.52
  4. Step 4: Simplify right side
    258,181.74x = 44,871,155,479.94
  5. Step 5: Solve for x
    x = 44,871,155,479.94/258,181.74
  6. Step 6: Final answer
    x = 173,796.78

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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.