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Finding the Fourth Proportional to 71,975.75, 99,326.90 and 40,145.99

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Solution

The fourth proportional to 71,975.75, 99,326.90 and 40,145.99 is: 55,401.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,975.75 : 99,326.90 = 40,145.99 : x
  2. Step 2: Convert to fraction form
    71,975.75/99,326.90 = 40,145.99/x
  3. Step 3: Cross multiply
    71,975.75x = 99,326.90 × 40,145.99
  4. Step 4: Simplify right side
    71,975.75x = 3,987,576,337.86
  5. Step 5: Solve for x
    x = 3,987,576,337.86/71,975.75
  6. Step 6: Final answer
    x = 55,401.67

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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.