Home / 81,142.28-121,710.78-36,769.16

Finding the Fourth Proportional to 81,142.28, 121,710.78 and 36,769.16

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Solution

The fourth proportional to 81,142.28, 121,710.78 and 36,769.16 is: 55,152.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,142.28 : 121,710.78 = 36,769.16 : x
  2. Step 2: Convert to fraction form
    81,142.28/121,710.78 = 36,769.16/x
  3. Step 3: Cross multiply
    81,142.28x = 121,710.78 × 36,769.16
  4. Step 4: Simplify right side
    81,142.28x = 4,475,203,143.54
  5. Step 5: Solve for x
    x = 4,475,203,143.54/81,142.28
  6. Step 6: Final answer
    x = 55,152.54

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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.