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Finding the Fourth Proportional to 128,935.42, 193,478.42 and 54,049.81

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Solution

The fourth proportional to 128,935.42, 193,478.42 and 54,049.81 is: 81,106.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,935.42 : 193,478.42 = 54,049.81 : x
  2. Step 2: Convert to fraction form
    128,935.42/193,478.42 = 54,049.81/x
  3. Step 3: Cross multiply
    128,935.42x = 193,478.42 × 54,049.81
  4. Step 4: Simplify right side
    128,935.42x = 10,457,471,007.83
  5. Step 5: Solve for x
    x = 10,457,471,007.83/128,935.42
  6. Step 6: Final answer
    x = 81,106.27

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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.