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Finding the Fourth Proportional to 100,344.39, 138,476.82 and 55,026.51

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Solution

The fourth proportional to 100,344.39, 138,476.82 and 55,026.51 is: 75,937.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,344.39 : 138,476.82 = 55,026.51 : x
  2. Step 2: Convert to fraction form
    100,344.39/138,476.82 = 55,026.51/x
  3. Step 3: Cross multiply
    100,344.39x = 138,476.82 × 55,026.51
  4. Step 4: Simplify right side
    100,344.39x = 7,619,895,845.37
  5. Step 5: Solve for x
    x = 7,619,895,845.37/100,344.39
  6. Step 6: Final answer
    x = 75,937.44

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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.