Home / 100,571.12-138,764.22-56,964.05

Finding the Fourth Proportional to 100,571.12, 138,764.22 and 56,964.05

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Solution

The fourth proportional to 100,571.12, 138,764.22 and 56,964.05 is: 78,596.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,571.12 : 138,764.22 = 56,964.05 : x
  2. Step 2: Convert to fraction form
    100,571.12/138,764.22 = 56,964.05/x
  3. Step 3: Cross multiply
    100,571.12x = 138,764.22 × 56,964.05
  4. Step 4: Simplify right side
    100,571.12x = 7,904,571,272.47
  5. Step 5: Solve for x
    x = 7,904,571,272.47/100,571.12
  6. Step 6: Final answer
    x = 78,596.83

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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.