Home / 135,686.16-188,104.55-128,487.56

Finding the Fourth Proportional to 135,686.16, 188,104.55 and 128,487.56

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Solution

The fourth proportional to 135,686.16, 188,104.55 and 128,487.56 is: 178,124.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,686.16 : 188,104.55 = 128,487.56 : x
  2. Step 2: Convert to fraction form
    135,686.16/188,104.55 = 128,487.56/x
  3. Step 3: Cross multiply
    135,686.16x = 188,104.55 × 128,487.56
  4. Step 4: Simplify right side
    135,686.16x = 24,169,093,071.44
  5. Step 5: Solve for x
    x = 24,169,093,071.44/135,686.16
  6. Step 6: Final answer
    x = 178,124.97

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.