Home / 80,780.64-111,438.99-56,920.44

Finding the Fourth Proportional to 80,780.64, 111,438.99 and 56,920.44

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Solution

The fourth proportional to 80,780.64, 111,438.99 and 56,920.44 is: 78,523.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,780.64 : 111,438.99 = 56,920.44 : x
  2. Step 2: Convert to fraction form
    80,780.64/111,438.99 = 56,920.44/x
  3. Step 3: Cross multiply
    80,780.64x = 111,438.99 × 56,920.44
  4. Step 4: Simplify right side
    80,780.64x = 6,343,156,343.96
  5. Step 5: Solve for x
    x = 6,343,156,343.96/80,780.64
  6. Step 6: Final answer
    x = 78,523.22

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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.