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Finding the Fourth Proportional to 71,965.80, 100,620.90 and 71,965.80

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Solution

The fourth proportional to 71,965.80, 100,620.90 and 71,965.80 is: 100,620.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,965.80 : 100,620.90 = 71,965.80 : x
  2. Step 2: Convert to fraction form
    71,965.80/100,620.90 = 71,965.80/x
  3. Step 3: Cross multiply
    71,965.80x = 100,620.90 × 71,965.80
  4. Step 4: Simplify right side
    71,965.80x = 7,241,263,565.22
  5. Step 5: Solve for x
    x = 7,241,263,565.22/71,965.80
  6. Step 6: Final answer
    x = 100,620.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.