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Finding the Fourth Proportional to 128,081.44, 191,864.44 and 63,845.72

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Solution

The fourth proportional to 128,081.44, 191,864.44 and 63,845.72 is: 95,640.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,081.44 : 191,864.44 = 63,845.72 : x
  2. Step 2: Convert to fraction form
    128,081.44/191,864.44 = 63,845.72/x
  3. Step 3: Cross multiply
    128,081.44x = 191,864.44 × 63,845.72
  4. Step 4: Simplify right side
    128,081.44x = 12,249,723,314.20
  5. Step 5: Solve for x
    x = 12,249,723,314.20/128,081.44
  6. Step 6: Final answer
    x = 95,640.11

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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.