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Finding the Fourth Proportional to 100,367.34, 138,496.95 and 57,939.54

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Solution

The fourth proportional to 100,367.34, 138,496.95 and 57,939.54 is: 79,950.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,367.34 : 138,496.95 = 57,939.54 : x
  2. Step 2: Convert to fraction form
    100,367.34/138,496.95 = 57,939.54/x
  3. Step 3: Cross multiply
    100,367.34x = 138,496.95 × 57,939.54
  4. Step 4: Simplify right side
    100,367.34x = 8,024,449,574.40
  5. Step 5: Solve for x
    x = 8,024,449,574.40/100,367.34
  6. Step 6: Final answer
    x = 79,950.80

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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.