Home / 80,491.32-111,107.79-69,115.10

Finding the Fourth Proportional to 80,491.32, 111,107.79 and 69,115.10

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Solution

The fourth proportional to 80,491.32, 111,107.79 and 69,115.10 is: 95,404.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,491.32 : 111,107.79 = 69,115.10 : x
  2. Step 2: Convert to fraction form
    80,491.32/111,107.79 = 69,115.10/x
  3. Step 3: Cross multiply
    80,491.32x = 111,107.79 × 69,115.10
  4. Step 4: Simplify right side
    80,491.32x = 7,679,225,461.09
  5. Step 5: Solve for x
    x = 7,679,225,461.09/80,491.32
  6. Step 6: Final answer
    x = 95,404.39

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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.