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Finding the Fourth Proportional to 65,756.80, 90,732.72 and 38,900.44

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Solution

The fourth proportional to 65,756.80, 90,732.72 and 38,900.44 is: 53,675.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,756.80 : 90,732.72 = 38,900.44 : x
  2. Step 2: Convert to fraction form
    65,756.80/90,732.72 = 38,900.44/x
  3. Step 3: Cross multiply
    65,756.80x = 90,732.72 × 38,900.44
  4. Step 4: Simplify right side
    65,756.80x = 3,529,542,730.40
  5. Step 5: Solve for x
    x = 3,529,542,730.40/65,756.80
  6. Step 6: Final answer
    x = 53,675.71

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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.