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Finding the Fourth Proportional to 71,991.84, 99,349.02 and 40,163.16

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Solution

The fourth proportional to 71,991.84, 99,349.02 and 40,163.16 is: 55,425.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,991.84 : 99,349.02 = 40,163.16 : x
  2. Step 2: Convert to fraction form
    71,991.84/99,349.02 = 40,163.16/x
  3. Step 3: Cross multiply
    71,991.84x = 99,349.02 × 40,163.16
  4. Step 4: Simplify right side
    71,991.84x = 3,990,170,586.10
  5. Step 5: Solve for x
    x = 3,990,170,586.10/71,991.84
  6. Step 6: Final answer
    x = 55,425.32

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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.