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Finding the Fourth Proportional to 100,844.80, 139,189.76 and 58,426.56

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Solution

The fourth proportional to 100,844.80, 139,189.76 and 58,426.56 is: 80,642.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,844.80 : 139,189.76 = 58,426.56 : x
  2. Step 2: Convert to fraction form
    100,844.80/139,189.76 = 58,426.56/x
  3. Step 3: Cross multiply
    100,844.80x = 139,189.76 × 58,426.56
  4. Step 4: Simplify right side
    100,844.80x = 8,132,378,864.03
  5. Step 5: Solve for x
    x = 8,132,378,864.03/100,844.80
  6. Step 6: Final answer
    x = 80,642.52

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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.