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Finding the Fourth Proportional to 90,198.35, 124,479.95 and 49,913.81

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Solution

The fourth proportional to 90,198.35, 124,479.95 and 49,913.81 is: 68,884.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,198.35 : 124,479.95 = 49,913.81 : x
  2. Step 2: Convert to fraction form
    90,198.35/124,479.95 = 49,913.81/x
  3. Step 3: Cross multiply
    90,198.35x = 124,479.95 × 49,913.81
  4. Step 4: Simplify right side
    90,198.35x = 6,213,268,573.11
  5. Step 5: Solve for x
    x = 6,213,268,573.11/90,198.35
  6. Step 6: Final answer
    x = 68,884.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.