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Finding the Fourth Proportional to 71,992.84, 99,350.40 and 40,164.16

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Solution

The fourth proportional to 71,992.84, 99,350.40 and 40,164.16 is: 55,426.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,992.84 : 99,350.40 = 40,164.16 : x
  2. Step 2: Convert to fraction form
    71,992.84/99,350.40 = 40,164.16/x
  3. Step 3: Cross multiply
    71,992.84x = 99,350.40 × 40,164.16
  4. Step 4: Simplify right side
    71,992.84x = 3,990,325,361.66
  5. Step 5: Solve for x
    x = 3,990,325,361.66/71,992.84
  6. Step 6: Final answer
    x = 55,426.70

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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.