Home / 81,785.39-122,667.28-28,465.92

Finding the Fourth Proportional to 81,785.39, 122,667.28 and 28,465.92

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Solution

The fourth proportional to 81,785.39, 122,667.28 and 28,465.92 is: 42,695.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,785.39 : 122,667.28 = 28,465.92 : x
  2. Step 2: Convert to fraction form
    81,785.39/122,667.28 = 28,465.92/x
  3. Step 3: Cross multiply
    81,785.39x = 122,667.28 × 28,465.92
  4. Step 4: Simplify right side
    81,785.39x = 3,491,836,907.93
  5. Step 5: Solve for x
    x = 3,491,836,907.93/81,785.39
  6. Step 6: Final answer
    x = 42,695.12

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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.