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Finding the Fourth Proportional to 85,855.44, 128,758.20 and 33,253.20

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Solution

The fourth proportional to 85,855.44, 128,758.20 and 33,253.20 is: 49,870.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,855.44 : 128,758.20 = 33,253.20 : x
  2. Step 2: Convert to fraction form
    85,855.44/128,758.20 = 33,253.20/x
  3. Step 3: Cross multiply
    85,855.44x = 128,758.20 × 33,253.20
  4. Step 4: Simplify right side
    85,855.44x = 4,281,622,176.24
  5. Step 5: Solve for x
    x = 4,281,622,176.24/85,855.44
  6. Step 6: Final answer
    x = 49,870.13

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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.