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Finding the Fourth Proportional to 84,755.81, 127,332.17 and 79,968.26

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Solution

The fourth proportional to 84,755.81, 127,332.17 and 79,968.26 is: 120,139.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,755.81 : 127,332.17 = 79,968.26 : x
  2. Step 2: Convert to fraction form
    84,755.81/127,332.17 = 79,968.26/x
  3. Step 3: Cross multiply
    84,755.81x = 127,332.17 × 79,968.26
  4. Step 4: Simplify right side
    84,755.81x = 10,182,531,040.42
  5. Step 5: Solve for x
    x = 10,182,531,040.42/84,755.81
  6. Step 6: Final answer
    x = 120,139.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.