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Finding the Fourth Proportional to 100,326.26, 138,401.25 and 84,404.90

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Solution

The fourth proportional to 100,326.26, 138,401.25 and 84,404.90 is: 116,437.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,326.26 : 138,401.25 = 84,404.90 : x
  2. Step 2: Convert to fraction form
    100,326.26/138,401.25 = 84,404.90/x
  3. Step 3: Cross multiply
    100,326.26x = 138,401.25 × 84,404.90
  4. Step 4: Simplify right side
    100,326.26x = 11,681,743,666.13
  5. Step 5: Solve for x
    x = 11,681,743,666.13/100,326.26
  6. Step 6: Final answer
    x = 116,437.55

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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.