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Finding the Fourth Proportional to 135,851.81, 204,109.81 and 128,298.56

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Solution

The fourth proportional to 135,851.81, 204,109.81 and 128,298.56 is: 192,761.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,851.81 : 204,109.81 = 128,298.56 : x
  2. Step 2: Convert to fraction form
    135,851.81/204,109.81 = 128,298.56/x
  3. Step 3: Cross multiply
    135,851.81x = 204,109.81 × 128,298.56
  4. Step 4: Simplify right side
    135,851.81x = 26,186,993,363.58
  5. Step 5: Solve for x
    x = 26,186,993,363.58/135,851.81
  6. Step 6: Final answer
    x = 192,761.47

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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.