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Finding the Fourth Proportional to 89,307.96, 133,965.18 and 26,979

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Solution

The fourth proportional to 89,307.96, 133,965.18 and 26,979 is: 40,469.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,307.96 : 133,965.18 = 26,979 : x
  2. Step 2: Convert to fraction form
    89,307.96/133,965.18 = 26,979/x
  3. Step 3: Cross multiply
    89,307.96x = 133,965.18 × 26,979
  4. Step 4: Simplify right side
    89,307.96x = 3,614,246,591.22
  5. Step 5: Solve for x
    x = 3,614,246,591.22/89,307.96
  6. Step 6: Final answer
    x = 40,469.48

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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.