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Finding the Fourth Proportional to 139,801.58, 192,919.54 and 79,364.01

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Solution

The fourth proportional to 139,801.58, 192,919.54 and 79,364.01 is: 109,518.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,801.58 : 192,919.54 = 79,364.01 : x
  2. Step 2: Convert to fraction form
    139,801.58/192,919.54 = 79,364.01/x
  3. Step 3: Cross multiply
    139,801.58x = 192,919.54 × 79,364.01
  4. Step 4: Simplify right side
    139,801.58x = 15,310,868,193.48
  5. Step 5: Solve for x
    x = 15,310,868,193.48/139,801.58
  6. Step 6: Final answer
    x = 109,518.56

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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.