Home / 79,121.32-109,138.24-48,915.88

Finding the Fourth Proportional to 79,121.32, 109,138.24 and 48,915.88

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Solution

The fourth proportional to 79,121.32, 109,138.24 and 48,915.88 is: 67,473.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,121.32 : 109,138.24 = 48,915.88 : x
  2. Step 2: Convert to fraction form
    79,121.32/109,138.24 = 48,915.88/x
  3. Step 3: Cross multiply
    79,121.32x = 109,138.24 × 48,915.88
  4. Step 4: Simplify right side
    79,121.32x = 5,338,593,051.25
  5. Step 5: Solve for x
    x = 5,338,593,051.25/79,121.32
  6. Step 6: Final answer
    x = 67,473.51

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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.