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Finding the Fourth Proportional to 99,510, 137,440.44 and 65,917.68

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Solution

The fourth proportional to 99,510, 137,440.44 and 65,917.68 is: 91,043.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,510 : 137,440.44 = 65,917.68 : x
  2. Step 2: Convert to fraction form
    99,510/137,440.44 = 65,917.68/x
  3. Step 3: Cross multiply
    99,510x = 137,440.44 × 65,917.68
  4. Step 4: Simplify right side
    99,510x = 9,059,754,942.98
  5. Step 5: Solve for x
    x = 9,059,754,942.98/99,510
  6. Step 6: Final answer
    x = 91,043.66

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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.