Home / 80,723.14-121,029.95-45,208.87

Finding the Fourth Proportional to 80,723.14, 121,029.95 and 45,208.87

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Solution

The fourth proportional to 80,723.14, 121,029.95 and 45,208.87 is: 67,782.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,723.14 : 121,029.95 = 45,208.87 : x
  2. Step 2: Convert to fraction form
    80,723.14/121,029.95 = 45,208.87/x
  3. Step 3: Cross multiply
    80,723.14x = 121,029.95 × 45,208.87
  4. Step 4: Simplify right side
    80,723.14x = 5,471,627,086.10
  5. Step 5: Solve for x
    x = 5,471,627,086.10/80,723.14
  6. Step 6: Final answer
    x = 67,782.64

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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.