Home / 81,140.28-121,710.39-33,754.47

Finding the Fourth Proportional to 81,140.28, 121,710.39 and 33,754.47

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Solution

The fourth proportional to 81,140.28, 121,710.39 and 33,754.47 is: 50,631.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,140.28 : 121,710.39 = 33,754.47 : x
  2. Step 2: Convert to fraction form
    81,140.28/121,710.39 = 33,754.47/x
  3. Step 3: Cross multiply
    81,140.28x = 121,710.39 × 33,754.47
  4. Step 4: Simplify right side
    81,140.28x = 4,108,269,707.94
  5. Step 5: Solve for x
    x = 4,108,269,707.94/81,140.28
  6. Step 6: Final answer
    x = 50,631.69

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1.5x scale

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.