Home / 80,757.18-111,329.42-56,809.53

Finding the Fourth Proportional to 80,757.18, 111,329.42 and 56,809.53

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Solution

The fourth proportional to 80,757.18, 111,329.42 and 56,809.53 is: 78,315.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,757.18 : 111,329.42 = 56,809.53 : x
  2. Step 2: Convert to fraction form
    80,757.18/111,329.42 = 56,809.53/x
  3. Step 3: Cross multiply
    80,757.18x = 111,329.42 × 56,809.53
  4. Step 4: Simplify right side
    80,757.18x = 6,324,571,741.32
  5. Step 5: Solve for x
    x = 6,324,571,741.32/80,757.18
  6. Step 6: Final answer
    x = 78,315.91

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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.