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Finding the Fourth Proportional to 65,750.80, 90,732.96 and 40,299.52

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Solution

The fourth proportional to 65,750.80, 90,732.96 and 40,299.52 is: 55,611.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,750.80 : 90,732.96 = 40,299.52 : x
  2. Step 2: Convert to fraction form
    65,750.80/90,732.96 = 40,299.52/x
  3. Step 3: Cross multiply
    65,750.80x = 90,732.96 × 40,299.52
  4. Step 4: Simplify right side
    65,750.80x = 3,656,494,736.18
  5. Step 5: Solve for x
    x = 3,656,494,736.18/65,750.80
  6. Step 6: Final answer
    x = 55,611.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.