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Finding the Fourth Proportional to 85,671.38, 128,552.03 and 35,107.94

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Solution

The fourth proportional to 85,671.38, 128,552.03 and 35,107.94 is: 52,680.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,671.38 : 128,552.03 = 35,107.94 : x
  2. Step 2: Convert to fraction form
    85,671.38/128,552.03 = 35,107.94/x
  3. Step 3: Cross multiply
    85,671.38x = 128,552.03 × 35,107.94
  4. Step 4: Simplify right side
    85,671.38x = 4,513,196,137.82
  5. Step 5: Solve for x
    x = 4,513,196,137.82/85,671.38
  6. Step 6: Final answer
    x = 52,680.33

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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.