Home / 100,679.07-138,937.64-55,359.97

Finding the Fourth Proportional to 100,679.07, 138,937.64 and 55,359.97

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Solution

The fourth proportional to 100,679.07, 138,937.64 and 55,359.97 is: 76,397.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,679.07 : 138,937.64 = 55,359.97 : x
  2. Step 2: Convert to fraction form
    100,679.07/138,937.64 = 55,359.97/x
  3. Step 3: Cross multiply
    100,679.07x = 138,937.64 × 55,359.97
  4. Step 4: Simplify right side
    100,679.07x = 7,691,583,582.27
  5. Step 5: Solve for x
    x = 7,691,583,582.27/100,679.07
  6. Step 6: Final answer
    x = 76,397.05

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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.