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Finding the Fourth Proportional to 139,937.74, 193,119.30 and 79,518.64

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Solution

The fourth proportional to 139,937.74, 193,119.30 and 79,518.64 is: 109,738.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,937.74 : 193,119.30 = 79,518.64 : x
  2. Step 2: Convert to fraction form
    139,937.74/193,119.30 = 79,518.64/x
  3. Step 3: Cross multiply
    139,937.74x = 193,119.30 × 79,518.64
  4. Step 4: Simplify right side
    139,937.74x = 15,356,584,093.75
  5. Step 5: Solve for x
    x = 15,356,584,093.75/139,937.74
  6. Step 6: Final answer
    x = 109,738.69

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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.