Home / 87,917.81-131,499.95-81,536.22

Finding the Fourth Proportional to 87,917.81, 131,499.95 and 81,536.22

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Solution

The fourth proportional to 87,917.81, 131,499.95 and 81,536.22 is: 121,954.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,917.81 : 131,499.95 = 81,536.22 : x
  2. Step 2: Convert to fraction form
    87,917.81/131,499.95 = 81,536.22/x
  3. Step 3: Cross multiply
    87,917.81x = 131,499.95 × 81,536.22
  4. Step 4: Simplify right side
    87,917.81x = 10,722,008,445.51
  5. Step 5: Solve for x
    x = 10,722,008,445.51/87,917.81
  6. Step 6: Final answer
    x = 121,954.90

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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.