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Finding the Fourth Proportional to 85,745.52, 128,631.87 and 35,799.84

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Solution

The fourth proportional to 85,745.52, 128,631.87 and 35,799.84 is: 53,705.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,745.52 : 128,631.87 = 35,799.84 : x
  2. Step 2: Convert to fraction form
    85,745.52/128,631.87 = 35,799.84/x
  3. Step 3: Cross multiply
    85,745.52x = 128,631.87 × 35,799.84
  4. Step 4: Simplify right side
    85,745.52x = 4,605,000,364.90
  5. Step 5: Solve for x
    x = 4,605,000,364.90/85,745.52
  6. Step 6: Final answer
    x = 53,705.43

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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.