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Finding the Fourth Proportional to 85,832.70, 128,489.85 and 75,464.70

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Solution

The fourth proportional to 85,832.70, 128,489.85 and 75,464.70 is: 112,969.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,832.70 : 128,489.85 = 75,464.70 : x
  2. Step 2: Convert to fraction form
    85,832.70/128,489.85 = 75,464.70/x
  3. Step 3: Cross multiply
    85,832.70x = 128,489.85 × 75,464.70
  4. Step 4: Simplify right side
    85,832.70x = 9,696,447,983.30
  5. Step 5: Solve for x
    x = 9,696,447,983.30/85,832.70
  6. Step 6: Final answer
    x = 112,969.16

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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.