Home / 135,544.16-187,039.32-78,163.76

Finding the Fourth Proportional to 135,544.16, 187,039.32 and 78,163.76

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Solution

The fourth proportional to 135,544.16, 187,039.32 and 78,163.76 is: 107,859.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,544.16 : 187,039.32 = 78,163.76 : x
  2. Step 2: Convert to fraction form
    135,544.16/187,039.32 = 78,163.76/x
  3. Step 3: Cross multiply
    135,544.16x = 187,039.32 × 78,163.76
  4. Step 4: Simplify right side
    135,544.16x = 14,619,696,519.04
  5. Step 5: Solve for x
    x = 14,619,696,519.04/135,544.16
  6. Step 6: Final answer
    x = 107,859.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.