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Finding the Fourth Proportional to 101,213.74, 139,676.08 and 55,891.66

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Solution

The fourth proportional to 101,213.74, 139,676.08 and 55,891.66 is: 77,131.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,213.74 : 139,676.08 = 55,891.66 : x
  2. Step 2: Convert to fraction form
    101,213.74/139,676.08 = 55,891.66/x
  3. Step 3: Cross multiply
    101,213.74x = 139,676.08 × 55,891.66
  4. Step 4: Simplify right side
    101,213.74x = 7,806,727,973.49
  5. Step 5: Solve for x
    x = 7,806,727,973.49/101,213.74
  6. Step 6: Final answer
    x = 77,131.11

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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.