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Finding the Fourth Proportional to 139,465.76, 192,466.80 and 79,034.39

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Solution

The fourth proportional to 139,465.76, 192,466.80 and 79,034.39 is: 109,069.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,465.76 : 192,466.80 = 79,034.39 : x
  2. Step 2: Convert to fraction form
    139,465.76/192,466.80 = 79,034.39/x
  3. Step 3: Cross multiply
    139,465.76x = 192,466.80 × 79,034.39
  4. Step 4: Simplify right side
    139,465.76x = 15,211,496,133.25
  5. Step 5: Solve for x
    x = 15,211,496,133.25/139,465.76
  6. Step 6: Final answer
    x = 109,069.75

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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.