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Finding the Fourth Proportional to 85,639.52, 128,371.44 and 33,028.32

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Solution

The fourth proportional to 85,639.52, 128,371.44 and 33,028.32 is: 49,508.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,639.52 : 128,371.44 = 33,028.32 : x
  2. Step 2: Convert to fraction form
    85,639.52/128,371.44 = 33,028.32/x
  3. Step 3: Cross multiply
    85,639.52x = 128,371.44 × 33,028.32
  4. Step 4: Simplify right side
    85,639.52x = 4,239,892,999.18
  5. Step 5: Solve for x
    x = 4,239,892,999.18/85,639.52
  6. Step 6: Final answer
    x = 49,508.60

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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.