Home / 100,566.32-138,777.72-55,857.20

Finding the Fourth Proportional to 100,566.32, 138,777.72 and 55,857.20

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Solution

The fourth proportional to 100,566.32, 138,777.72 and 55,857.20 is: 77,080.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,566.32 : 138,777.72 = 55,857.20 : x
  2. Step 2: Convert to fraction form
    100,566.32/138,777.72 = 55,857.20/x
  3. Step 3: Cross multiply
    100,566.32x = 138,777.72 × 55,857.20
  4. Step 4: Simplify right side
    100,566.32x = 7,751,734,861.58
  5. Step 5: Solve for x
    x = 7,751,734,861.58/100,566.32
  6. Step 6: Final answer
    x = 77,080.82

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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.