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Finding the Fourth Proportional to 139,233.87, 192,137.60 and 75,570.30

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Solution

The fourth proportional to 139,233.87, 192,137.60 and 75,570.30 is: 104,284.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,233.87 : 192,137.60 = 75,570.30 : x
  2. Step 2: Convert to fraction form
    139,233.87/192,137.60 = 75,570.30/x
  3. Step 3: Cross multiply
    139,233.87x = 192,137.60 × 75,570.30
  4. Step 4: Simplify right side
    139,233.87x = 14,519,894,734.74
  5. Step 5: Solve for x
    x = 14,519,894,734.74/139,233.87
  6. Step 6: Final answer
    x = 104,284.22

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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.