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Finding the Fourth Proportional to 71,771.60, 107,657.40 and 21,851.30

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Solution

The fourth proportional to 71,771.60, 107,657.40 and 21,851.30 is: 32,776.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,771.60 : 107,657.40 = 21,851.30 : x
  2. Step 2: Convert to fraction form
    71,771.60/107,657.40 = 21,851.30/x
  3. Step 3: Cross multiply
    71,771.60x = 107,657.40 × 21,851.30
  4. Step 4: Simplify right side
    71,771.60x = 2,352,454,144.62
  5. Step 5: Solve for x
    x = 2,352,454,144.62/71,771.60
  6. Step 6: Final answer
    x = 32,776.95

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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.