Home / 87,715.87-131,615.93-68,878.51

Finding the Fourth Proportional to 87,715.87, 131,615.93 and 68,878.51

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Solution

The fourth proportional to 87,715.87, 131,615.93 and 68,878.51 is: 103,350.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,715.87 : 131,615.93 = 68,878.51 : x
  2. Step 2: Convert to fraction form
    87,715.87/131,615.93 = 68,878.51/x
  3. Step 3: Cross multiply
    87,715.87x = 131,615.93 × 68,878.51
  4. Step 4: Simplify right side
    87,715.87x = 9,065,509,150.66
  5. Step 5: Solve for x
    x = 9,065,509,150.66/87,715.87
  6. Step 6: Final answer
    x = 103,350.84

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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.