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Finding the Fourth Proportional to 85,791.29, 128,704.14 and 29,633.45

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Solution

The fourth proportional to 85,791.29, 128,704.14 and 29,633.45 is: 44,456.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,791.29 : 128,704.14 = 29,633.45 : x
  2. Step 2: Convert to fraction form
    85,791.29/128,704.14 = 29,633.45/x
  3. Step 3: Cross multiply
    85,791.29x = 128,704.14 × 29,633.45
  4. Step 4: Simplify right side
    85,791.29x = 3,813,947,053.96
  5. Step 5: Solve for x
    x = 3,813,947,053.96/85,791.29
  6. Step 6: Final answer
    x = 44,456.11

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1.5x scale

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.