Home / 100,538.49-138,744.69-55,221.12

Finding the Fourth Proportional to 100,538.49, 138,744.69 and 55,221.12

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Solution

The fourth proportional to 100,538.49, 138,744.69 and 55,221.12 is: 76,206.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,538.49 : 138,744.69 = 55,221.12 : x
  2. Step 2: Convert to fraction form
    100,538.49/138,744.69 = 55,221.12/x
  3. Step 3: Cross multiply
    100,538.49x = 138,744.69 × 55,221.12
  4. Step 4: Simplify right side
    100,538.49x = 7,661,637,175.85
  5. Step 5: Solve for x
    x = 7,661,637,175.85/100,538.49
  6. Step 6: Final answer
    x = 76,206.01

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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.