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Finding the Fourth Proportional to 71,850.75, 99,157.07 and 40,019.64

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Solution

The fourth proportional to 71,850.75, 99,157.07 and 40,019.64 is: 55,228.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,850.75 : 99,157.07 = 40,019.64 : x
  2. Step 2: Convert to fraction form
    71,850.75/99,157.07 = 40,019.64/x
  3. Step 3: Cross multiply
    71,850.75x = 99,157.07 × 40,019.64
  4. Step 4: Simplify right side
    71,850.75x = 3,968,230,044.76
  5. Step 5: Solve for x
    x = 3,968,230,044.76/71,850.75
  6. Step 6: Final answer
    x = 55,228.79

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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.