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Finding the Fourth Proportional to 85,739.49, 128,622.87 and 35,793.87

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Solution

The fourth proportional to 85,739.49, 128,622.87 and 35,793.87 is: 53,696.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,739.49 : 128,622.87 = 35,793.87 : x
  2. Step 2: Convert to fraction form
    85,739.49/128,622.87 = 35,793.87/x
  3. Step 3: Cross multiply
    85,739.49x = 128,622.87 × 35,793.87
  4. Step 4: Simplify right side
    85,739.49x = 4,603,910,287.81
  5. Step 5: Solve for x
    x = 4,603,910,287.81/85,739.49
  6. Step 6: Final answer
    x = 53,696.50

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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.