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Finding the Fourth Proportional to 85,535.70, 128,266.85 and 29,381.46

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Solution

The fourth proportional to 85,535.70, 128,266.85 and 29,381.46 is: 44,059.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,535.70 : 128,266.85 = 29,381.46 : x
  2. Step 2: Convert to fraction form
    85,535.70/128,266.85 = 29,381.46/x
  3. Step 3: Cross multiply
    85,535.70x = 128,266.85 × 29,381.46
  4. Step 4: Simplify right side
    85,535.70x = 3,768,667,175.69
  5. Step 5: Solve for x
    x = 3,768,667,175.69/85,535.70
  6. Step 6: Final answer
    x = 44,059.58

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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.