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Finding the Fourth Proportional to 71,790.60, 107,708.85 and 21,880.20

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Solution

The fourth proportional to 71,790.60, 107,708.85 and 21,880.20 is: 32,827.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,790.60 : 107,708.85 = 21,880.20 : x
  2. Step 2: Convert to fraction form
    71,790.60/107,708.85 = 21,880.20/x
  3. Step 3: Cross multiply
    71,790.60x = 107,708.85 × 21,880.20
  4. Step 4: Simplify right side
    71,790.60x = 2,356,691,179.77
  5. Step 5: Solve for x
    x = 2,356,691,179.77/71,790.60
  6. Step 6: Final answer
    x = 32,827.29

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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.