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Finding the Fourth Proportional to 71,391.66, 107,101.01 and 28,700.39

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Solution

The fourth proportional to 71,391.66, 107,101.01 and 28,700.39 is: 43,056.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,391.66 : 107,101.01 = 28,700.39 : x
  2. Step 2: Convert to fraction form
    71,391.66/107,101.01 = 28,700.39/x
  3. Step 3: Cross multiply
    71,391.66x = 107,101.01 × 28,700.39
  4. Step 4: Simplify right side
    71,391.66x = 3,073,840,880.64
  5. Step 5: Solve for x
    x = 3,073,840,880.64/71,391.66
  6. Step 6: Final answer
    x = 43,056.02

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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.