Home / 100,328.82-138,451.90-55,007.13

Finding the Fourth Proportional to 100,328.82, 138,451.90 and 55,007.13

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Solution

The fourth proportional to 100,328.82, 138,451.90 and 55,007.13 is: 75,908.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,328.82 : 138,451.90 = 55,007.13 : x
  2. Step 2: Convert to fraction form
    100,328.82/138,451.90 = 55,007.13/x
  3. Step 3: Cross multiply
    100,328.82x = 138,451.90 × 55,007.13
  4. Step 4: Simplify right side
    100,328.82x = 7,615,841,662.05
  5. Step 5: Solve for x
    x = 7,615,841,662.05/100,328.82
  6. Step 6: Final answer
    x = 75,908.81

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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.