Home / 71,821.62-99,110.79-39,989.70

Finding the Fourth Proportional to 71,821.62, 99,110.79 and 39,989.70

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Solution

The fourth proportional to 71,821.62, 99,110.79 and 39,989.70 is: 55,184.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,821.62 : 99,110.79 = 39,989.70 : x
  2. Step 2: Convert to fraction form
    71,821.62/99,110.79 = 39,989.70/x
  3. Step 3: Cross multiply
    71,821.62x = 99,110.79 × 39,989.70
  4. Step 4: Simplify right side
    71,821.62x = 3,963,410,758.86
  5. Step 5: Solve for x
    x = 3,963,410,758.86/71,821.62
  6. Step 6: Final answer
    x = 55,184.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.