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Finding the Fourth Proportional to 85,766.50, 128,597.65 and 38,372.76

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Solution

The fourth proportional to 85,766.50, 128,597.65 and 38,372.76 is: 57,535.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,766.50 : 128,597.65 = 38,372.76 : x
  2. Step 2: Convert to fraction form
    85,766.50/128,597.65 = 38,372.76/x
  3. Step 3: Cross multiply
    85,766.50x = 128,597.65 × 38,372.76
  4. Step 4: Simplify right side
    85,766.50x = 4,934,647,133.69
  5. Step 5: Solve for x
    x = 4,934,647,133.69/85,766.50
  6. Step 6: Final answer
    x = 57,535.84

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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.