Home / 100,231.20-138,319.20-55,519.20

Finding the Fourth Proportional to 100,231.20, 138,319.20 and 55,519.20

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Solution

The fourth proportional to 100,231.20, 138,319.20 and 55,519.20 is: 76,616.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,231.20 : 138,319.20 = 55,519.20 : x
  2. Step 2: Convert to fraction form
    100,231.20/138,319.20 = 55,519.20/x
  3. Step 3: Cross multiply
    100,231.20x = 138,319.20 × 55,519.20
  4. Step 4: Simplify right side
    100,231.20x = 7,679,371,328.64
  5. Step 5: Solve for x
    x = 7,679,371,328.64/100,231.20
  6. Step 6: Final answer
    x = 76,616.58

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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.