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Finding the Fourth Proportional to 139,113.11, 191,976.44 and 75,450.92

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Solution

The fourth proportional to 139,113.11, 191,976.44 and 75,450.92 is: 104,122.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,113.11 : 191,976.44 = 75,450.92 : x
  2. Step 2: Convert to fraction form
    139,113.11/191,976.44 = 75,450.92/x
  3. Step 3: Cross multiply
    139,113.11x = 191,976.44 × 75,450.92
  4. Step 4: Simplify right side
    139,113.11x = 14,484,797,679.19
  5. Step 5: Solve for x
    x = 14,484,797,679.19/139,113.11
  6. Step 6: Final answer
    x = 104,122.45

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1.5x scale

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.