Home / 128,390.27-177,202.89-86,022.41

Finding the Fourth Proportional to 128,390.27, 177,202.89 and 86,022.41

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Solution

The fourth proportional to 128,390.27, 177,202.89 and 86,022.41 is: 118,727.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,390.27 : 177,202.89 = 86,022.41 : x
  2. Step 2: Convert to fraction form
    128,390.27/177,202.89 = 86,022.41/x
  3. Step 3: Cross multiply
    128,390.27x = 177,202.89 × 86,022.41
  4. Step 4: Simplify right side
    128,390.27x = 15,243,418,770.75
  5. Step 5: Solve for x
    x = 15,243,418,770.75/128,390.27
  6. Step 6: Final answer
    x = 118,727.22

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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.