Home / 258,513.12-387,780.11-90,050.48

Finding the Fourth Proportional to 258,513.12, 387,780.11 and 90,050.48

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Solution

The fourth proportional to 258,513.12, 387,780.11 and 90,050.48 is: 135,079.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,513.12 : 387,780.11 = 90,050.48 : x
  2. Step 2: Convert to fraction form
    258,513.12/387,780.11 = 90,050.48/x
  3. Step 3: Cross multiply
    258,513.12x = 387,780.11 × 90,050.48
  4. Step 4: Simplify right side
    258,513.12x = 34,919,785,559.15
  5. Step 5: Solve for x
    x = 34,919,785,559.15/258,513.12
  6. Step 6: Final answer
    x = 135,079.36

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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.