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Finding the Fourth Proportional to 103,687.78, 143,037.93 and 65,974.18

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Solution

The fourth proportional to 103,687.78, 143,037.93 and 65,974.18 is: 91,011.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,687.78 : 143,037.93 = 65,974.18 : x
  2. Step 2: Convert to fraction form
    103,687.78/143,037.93 = 65,974.18/x
  3. Step 3: Cross multiply
    103,687.78x = 143,037.93 × 65,974.18
  4. Step 4: Simplify right side
    103,687.78x = 9,436,810,140.65
  5. Step 5: Solve for x
    x = 9,436,810,140.65/103,687.78
  6. Step 6: Final answer
    x = 91,011.79

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1.5x scale

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.