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Finding the Fourth Proportional to 71,510.45, 107,245.22 and 28,815.75

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Solution

The fourth proportional to 71,510.45, 107,245.22 and 28,815.75 is: 43,215.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,510.45 : 107,245.22 = 28,815.75 : x
  2. Step 2: Convert to fraction form
    71,510.45/107,245.22 = 28,815.75/x
  3. Step 3: Cross multiply
    71,510.45x = 107,245.22 × 28,815.75
  4. Step 4: Simplify right side
    71,510.45x = 3,090,351,304.14
  5. Step 5: Solve for x
    x = 3,090,351,304.14/71,510.45
  6. Step 6: Final answer
    x = 43,215.38

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1.5x scale

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.