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Finding the Fourth Proportional to 85,991.52, 128,834.52 and 73,383.60

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Solution

The fourth proportional to 85,991.52, 128,834.52 and 73,383.60 is: 109,945.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,991.52 : 128,834.52 = 73,383.60 : x
  2. Step 2: Convert to fraction form
    85,991.52/128,834.52 = 73,383.60/x
  3. Step 3: Cross multiply
    85,991.52x = 128,834.52 × 73,383.60
  4. Step 4: Simplify right side
    85,991.52x = 9,454,340,881.87
  5. Step 5: Solve for x
    x = 9,454,340,881.87/85,991.52
  6. Step 6: Final answer
    x = 109,945.04

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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.