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Finding the Fourth Proportional to 80,605.94, 120,555.24 and 71,783.45

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Solution

The fourth proportional to 80,605.94, 120,555.24 and 71,783.45 is: 107,360.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,605.94 : 120,555.24 = 71,783.45 : x
  2. Step 2: Convert to fraction form
    80,605.94/120,555.24 = 71,783.45/x
  3. Step 3: Cross multiply
    80,605.94x = 120,555.24 × 71,783.45
  4. Step 4: Simplify right side
    80,605.94x = 8,653,870,622.90
  5. Step 5: Solve for x
    x = 8,653,870,622.90/80,605.94
  6. Step 6: Final answer
    x = 107,360.22

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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.