Home / 80,813.60-121,097.39-38,635.72

Finding the Fourth Proportional to 80,813.60, 121,097.39 and 38,635.72

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Solution

The fourth proportional to 80,813.60, 121,097.39 and 38,635.72 is: 57,894.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,813.60 : 121,097.39 = 38,635.72 : x
  2. Step 2: Convert to fraction form
    80,813.60/121,097.39 = 38,635.72/x
  3. Step 3: Cross multiply
    80,813.60x = 121,097.39 × 38,635.72
  4. Step 4: Simplify right side
    80,813.60x = 4,678,684,356.85
  5. Step 5: Solve for x
    x = 4,678,684,356.85/80,813.60
  6. Step 6: Final answer
    x = 57,894.76

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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.