Home / 135,621.51-187,158.39-78,263.22

Finding the Fourth Proportional to 135,621.51, 187,158.39 and 78,263.22

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Solution

The fourth proportional to 135,621.51, 187,158.39 and 78,263.22 is: 108,003.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,621.51 : 187,158.39 = 78,263.22 : x
  2. Step 2: Convert to fraction form
    135,621.51/187,158.39 = 78,263.22/x
  3. Step 3: Cross multiply
    135,621.51x = 187,158.39 × 78,263.22
  4. Step 4: Simplify right side
    135,621.51x = 14,647,618,251.42
  5. Step 5: Solve for x
    x = 14,647,618,251.42/135,621.51
  6. Step 6: Final answer
    x = 108,003.65

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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.