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Finding the Fourth Proportional to 71,628.60, 107,442.90 and 21,706.20

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Solution

The fourth proportional to 71,628.60, 107,442.90 and 21,706.20 is: 32,559.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,628.60 : 107,442.90 = 21,706.20 : x
  2. Step 2: Convert to fraction form
    71,628.60/107,442.90 = 21,706.20/x
  3. Step 3: Cross multiply
    71,628.60x = 107,442.90 × 21,706.20
  4. Step 4: Simplify right side
    71,628.60x = 2,332,177,075.98
  5. Step 5: Solve for x
    x = 2,332,177,075.98/71,628.60
  6. Step 6: Final answer
    x = 32,559.30

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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.