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Finding the Fourth Proportional to 99,212.52, 136,949.22 and 65,689.32

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Solution

The fourth proportional to 99,212.52, 136,949.22 and 65,689.32 is: 90,675.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,212.52 : 136,949.22 = 65,689.32 : x
  2. Step 2: Convert to fraction form
    99,212.52/136,949.22 = 65,689.32/x
  3. Step 3: Cross multiply
    99,212.52x = 136,949.22 × 65,689.32
  4. Step 4: Simplify right side
    99,212.52x = 8,996,101,136.33
  5. Step 5: Solve for x
    x = 8,996,101,136.33/99,212.52
  6. Step 6: Final answer
    x = 90,675.06

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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.