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Finding the Fourth Proportional to 66,983.80, 100,329.90 and 40,642.60

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Solution

The fourth proportional to 66,983.80, 100,329.90 and 40,642.60 is: 60,875.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,983.80 : 100,329.90 = 40,642.60 : x
  2. Step 2: Convert to fraction form
    66,983.80/100,329.90 = 40,642.60/x
  3. Step 3: Cross multiply
    66,983.80x = 100,329.90 × 40,642.60
  4. Step 4: Simplify right side
    66,983.80x = 4,077,667,993.74
  5. Step 5: Solve for x
    x = 4,077,667,993.74/66,983.80
  6. Step 6: Final answer
    x = 60,875.44

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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.