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Finding the Fourth Proportional to 71,775.60, 107,663.40 and 21,855.30

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Solution

The fourth proportional to 71,775.60, 107,663.40 and 21,855.30 is: 32,782.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,775.60 : 107,663.40 = 21,855.30 : x
  2. Step 2: Convert to fraction form
    71,775.60/107,663.40 = 21,855.30/x
  3. Step 3: Cross multiply
    71,775.60x = 107,663.40 × 21,855.30
  4. Step 4: Simplify right side
    71,775.60x = 2,353,015,906.02
  5. Step 5: Solve for x
    x = 2,353,015,906.02/71,775.60
  6. Step 6: Final answer
    x = 32,782.95

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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.