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Finding the Fourth Proportional to 71,570.80, 107,356.20 and 36,141.40

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Solution

The fourth proportional to 71,570.80, 107,356.20 and 36,141.40 is: 54,212.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,570.80 : 107,356.20 = 36,141.40 : x
  2. Step 2: Convert to fraction form
    71,570.80/107,356.20 = 36,141.40/x
  3. Step 3: Cross multiply
    71,570.80x = 107,356.20 × 36,141.40
  4. Step 4: Simplify right side
    71,570.80x = 3,880,003,366.68
  5. Step 5: Solve for x
    x = 3,880,003,366.68/71,570.80
  6. Step 6: Final answer
    x = 54,212.10

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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.