Home / 90,864.56-136,086.24-87,712.86

Finding the Fourth Proportional to 90,864.56, 136,086.24 and 87,712.86

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Solution

The fourth proportional to 90,864.56, 136,086.24 and 87,712.86 is: 131,365.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,864.56 : 136,086.24 = 87,712.86 : x
  2. Step 2: Convert to fraction form
    90,864.56/136,086.24 = 87,712.86/x
  3. Step 3: Cross multiply
    90,864.56x = 136,086.24 × 87,712.86
  4. Step 4: Simplify right side
    90,864.56x = 11,936,513,317.05
  5. Step 5: Solve for x
    x = 11,936,513,317.05/90,864.56
  6. Step 6: Final answer
    x = 131,365.99

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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.