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Finding the Fourth Proportional to 66,812.23, 100,078.90 and 40,073.42

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Solution

The fourth proportional to 66,812.23, 100,078.90 and 40,073.42 is: 60,026.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,812.23 : 100,078.90 = 40,073.42 : x
  2. Step 2: Convert to fraction form
    66,812.23/100,078.90 = 40,073.42/x
  3. Step 3: Cross multiply
    66,812.23x = 100,078.90 × 40,073.42
  4. Step 4: Simplify right side
    66,812.23x = 4,010,504,083.88
  5. Step 5: Solve for x
    x = 4,010,504,083.88/66,812.23
  6. Step 6: Final answer
    x = 60,026.50

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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.