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Finding the Fourth Proportional to 128,737.42, 193,073.81 and 61,227.80

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Solution

The fourth proportional to 128,737.42, 193,073.81 and 61,227.80 is: 91,826.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,737.42 : 193,073.81 = 61,227.80 : x
  2. Step 2: Convert to fraction form
    128,737.42/193,073.81 = 61,227.80/x
  3. Step 3: Cross multiply
    128,737.42x = 193,073.81 × 61,227.80
  4. Step 4: Simplify right side
    128,737.42x = 11,821,483,811.62
  5. Step 5: Solve for x
    x = 11,821,483,811.62/128,737.42
  6. Step 6: Final answer
    x = 91,826.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.