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Finding the Fourth Proportional to 89,988.96, 124,117.64 and 79,791.96

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Solution

The fourth proportional to 89,988.96, 124,117.64 and 79,791.96 is: 110,053.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,988.96 : 124,117.64 = 79,791.96 : x
  2. Step 2: Convert to fraction form
    89,988.96/124,117.64 = 79,791.96/x
  3. Step 3: Cross multiply
    89,988.96x = 124,117.64 × 79,791.96
  4. Step 4: Simplify right side
    89,988.96x = 9,903,589,766.17
  5. Step 5: Solve for x
    x = 9,903,589,766.17/89,988.96
  6. Step 6: Final answer
    x = 110,053.39

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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.