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Finding the Fourth Proportional to 100,424.52, 138,581.16 and 55,101.48

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Solution

The fourth proportional to 100,424.52, 138,581.16 and 55,101.48 is: 76,037.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,424.52 : 138,581.16 = 55,101.48 : x
  2. Step 2: Convert to fraction form
    100,424.52/138,581.16 = 55,101.48/x
  3. Step 3: Cross multiply
    100,424.52x = 138,581.16 × 55,101.48
  4. Step 4: Simplify right side
    100,424.52x = 7,636,027,016.12
  5. Step 5: Solve for x
    x = 7,636,027,016.12/100,424.52
  6. Step 6: Final answer
    x = 76,037.48

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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.