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Finding the Fourth Proportional to 328,087.10, 492,069.90 and 91,380.80

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Solution

The fourth proportional to 328,087.10, 492,069.90 and 91,380.80 is: 137,054.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,087.10 : 492,069.90 = 91,380.80 : x
  2. Step 2: Convert to fraction form
    328,087.10/492,069.90 = 91,380.80/x
  3. Step 3: Cross multiply
    328,087.10x = 492,069.90 × 91,380.80
  4. Step 4: Simplify right side
    328,087.10x = 44,965,741,117.92
  5. Step 5: Solve for x
    x = 44,965,741,117.92/328,087.10
  6. Step 6: Final answer
    x = 137,054.28

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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.