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Finding the Fourth Proportional to 258,878.11, 387,756.29 and 125,479.32

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Solution

The fourth proportional to 258,878.11, 387,756.29 and 125,479.32 is: 187,947.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,878.11 : 387,756.29 = 125,479.32 : x
  2. Step 2: Convert to fraction form
    258,878.11/387,756.29 = 125,479.32/x
  3. Step 3: Cross multiply
    258,878.11x = 387,756.29 × 125,479.32
  4. Step 4: Simplify right side
    258,878.11x = 48,655,395,594.92
  5. Step 5: Solve for x
    x = 48,655,395,594.92/258,878.11
  6. Step 6: Final answer
    x = 187,947.12

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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.