Home / 87,781.56-131,413.86-54,394.32

Finding the Fourth Proportional to 87,781.56, 131,413.86 and 54,394.32

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Solution

The fourth proportional to 87,781.56, 131,413.86 and 54,394.32 is: 81,431.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,781.56 : 131,413.86 = 54,394.32 : x
  2. Step 2: Convert to fraction form
    87,781.56/131,413.86 = 54,394.32/x
  3. Step 3: Cross multiply
    87,781.56x = 131,413.86 × 54,394.32
  4. Step 4: Simplify right side
    87,781.56x = 7,148,167,553.28
  5. Step 5: Solve for x
    x = 7,148,167,553.28/87,781.56
  6. Step 6: Final answer
    x = 81,431.31

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1.5x scale

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.