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Finding the Fourth Proportional to 128,728.63, 193,062.16 and 44,491.77

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Solution

The fourth proportional to 128,728.63, 193,062.16 and 44,491.77 is: 66,727.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,728.63 : 193,062.16 = 44,491.77 : x
  2. Step 2: Convert to fraction form
    128,728.63/193,062.16 = 44,491.77/x
  3. Step 3: Cross multiply
    128,728.63x = 193,062.16 × 44,491.77
  4. Step 4: Simplify right side
    128,728.63x = 8,589,677,218.42
  5. Step 5: Solve for x
    x = 8,589,677,218.42/128,728.63
  6. Step 6: Final answer
    x = 66,727.01

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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.