Home / 258,850.08-388,275.12-81,372.60

Finding the Fourth Proportional to 258,850.08, 388,275.12 and 81,372.60

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Solution

The fourth proportional to 258,850.08, 388,275.12 and 81,372.60 is: 122,058.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,850.08 : 388,275.12 = 81,372.60 : x
  2. Step 2: Convert to fraction form
    258,850.08/388,275.12 = 81,372.60/x
  3. Step 3: Cross multiply
    258,850.08x = 388,275.12 × 81,372.60
  4. Step 4: Simplify right side
    258,850.08x = 31,594,956,029.71
  5. Step 5: Solve for x
    x = 31,594,956,029.71/258,850.08
  6. Step 6: Final answer
    x = 122,058.90

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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.