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Finding the Fourth Proportional to 71,290.60, 106,935.90 and 54,701.80

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Solution

The fourth proportional to 71,290.60, 106,935.90 and 54,701.80 is: 82,052.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,290.60 : 106,935.90 = 54,701.80 : x
  2. Step 2: Convert to fraction form
    71,290.60/106,935.90 = 54,701.80/x
  3. Step 3: Cross multiply
    71,290.60x = 106,935.90 × 54,701.80
  4. Step 4: Simplify right side
    71,290.60x = 5,849,586,214.62
  5. Step 5: Solve for x
    x = 5,849,586,214.62/71,290.60
  6. Step 6: Final answer
    x = 82,052.70

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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.