Home / 100,126.99-138,175.23-54,805.06

Finding the Fourth Proportional to 100,126.99, 138,175.23 and 54,805.06

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Solution

The fourth proportional to 100,126.99, 138,175.23 and 54,805.06 is: 75,630.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,126.99 : 138,175.23 = 54,805.06 : x
  2. Step 2: Convert to fraction form
    100,126.99/138,175.23 = 54,805.06/x
  3. Step 3: Cross multiply
    100,126.99x = 138,175.23 × 54,805.06
  4. Step 4: Simplify right side
    100,126.99x = 7,572,701,770.66
  5. Step 5: Solve for x
    x = 7,572,701,770.66/100,126.99
  6. Step 6: Final answer
    x = 75,630.97

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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.