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Finding the Fourth Proportional to 100,983.83, 139,358.66 and 55,663.56

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Solution

The fourth proportional to 100,983.83, 139,358.66 and 55,663.56 is: 76,816.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,983.83 : 139,358.66 = 55,663.56 : x
  2. Step 2: Convert to fraction form
    100,983.83/139,358.66 = 55,663.56/x
  3. Step 3: Cross multiply
    100,983.83x = 139,358.66 × 55,663.56
  4. Step 4: Simplify right side
    100,983.83x = 7,757,198,854.11
  5. Step 5: Solve for x
    x = 7,757,198,854.11/100,983.83
  6. Step 6: Final answer
    x = 76,816.25

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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.