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Finding the Fourth Proportional to 139,855.85, 193,001.32 and 79,426.48

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Solution

The fourth proportional to 139,855.85, 193,001.32 and 79,426.48 is: 109,608.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,855.85 : 193,001.32 = 79,426.48 : x
  2. Step 2: Convert to fraction form
    139,855.85/193,001.32 = 79,426.48/x
  3. Step 3: Cross multiply
    139,855.85x = 193,001.32 × 79,426.48
  4. Step 4: Simplify right side
    139,855.85x = 15,329,415,482.95
  5. Step 5: Solve for x
    x = 15,329,415,482.95/139,855.85
  6. Step 6: Final answer
    x = 109,608.69

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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.