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Finding the Fourth Proportional to 100,367.61, 138,467.78 and 57,917.94

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Solution

The fourth proportional to 100,367.61, 138,467.78 and 57,917.94 is: 79,903.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,367.61 : 138,467.78 = 57,917.94 : x
  2. Step 2: Convert to fraction form
    100,367.61/138,467.78 = 57,917.94/x
  3. Step 3: Cross multiply
    100,367.61x = 138,467.78 × 57,917.94
  4. Step 4: Simplify right side
    100,367.61x = 8,019,768,284.38
  5. Step 5: Solve for x
    x = 8,019,768,284.38/100,367.61
  6. Step 6: Final answer
    x = 79,903.95

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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.