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Finding the Fourth Proportional to 71,777.10, 107,665.65 and 21,856.80

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Solution

The fourth proportional to 71,777.10, 107,665.65 and 21,856.80 is: 32,785.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,777.10 : 107,665.65 = 21,856.80 : x
  2. Step 2: Convert to fraction form
    71,777.10/107,665.65 = 21,856.80/x
  3. Step 3: Cross multiply
    71,777.10x = 107,665.65 × 21,856.80
  4. Step 4: Simplify right side
    71,777.10x = 2,353,226,578.92
  5. Step 5: Solve for x
    x = 2,353,226,578.92/71,777.10
  6. Step 6: Final answer
    x = 32,785.20

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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.