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Finding the Fourth Proportional to 139,240.80, 192,152.51 and 75,578.64

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Solution

The fourth proportional to 139,240.80, 192,152.51 and 75,578.64 is: 104,298.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,240.80 : 192,152.51 = 75,578.64 : x
  2. Step 2: Convert to fraction form
    139,240.80/192,152.51 = 75,578.64/x
  3. Step 3: Cross multiply
    139,240.80x = 192,152.51 × 75,578.64
  4. Step 4: Simplify right side
    139,240.80x = 14,522,625,378.39
  5. Step 5: Solve for x
    x = 14,522,625,378.39/139,240.80
  6. Step 6: Final answer
    x = 104,298.64

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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.