Home / 258,128.70-387,292.34-124,998.72

Finding the Fourth Proportional to 258,128.70, 387,292.34 and 124,998.72

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Solution

The fourth proportional to 258,128.70, 387,292.34 and 124,998.72 is: 187,546.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,128.70 : 387,292.34 = 124,998.72 : x
  2. Step 2: Convert to fraction form
    258,128.70/387,292.34 = 124,998.72/x
  3. Step 3: Cross multiply
    258,128.70x = 387,292.34 × 124,998.72
  4. Step 4: Simplify right side
    258,128.70x = 48,411,046,765.80
  5. Step 5: Solve for x
    x = 48,411,046,765.80/258,128.70
  6. Step 6: Final answer
    x = 187,546.16

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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.