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Finding the Fourth Proportional to 139,599.68, 192,561.14 and 121,737.56

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Solution

The fourth proportional to 139,599.68, 192,561.14 and 121,737.56 is: 167,922.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,599.68 : 192,561.14 = 121,737.56 : x
  2. Step 2: Convert to fraction form
    139,599.68/192,561.14 = 121,737.56/x
  3. Step 3: Cross multiply
    139,599.68x = 192,561.14 × 121,737.56
  4. Step 4: Simplify right side
    139,599.68x = 23,441,923,334.42
  5. Step 5: Solve for x
    x = 23,441,923,334.42/139,599.68
  6. Step 6: Final answer
    x = 167,922.47

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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.