Home / 103,942.89-143,463.44-65,678.14

Finding the Fourth Proportional to 103,942.89, 143,463.44 and 65,678.14

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Solution

The fourth proportional to 103,942.89, 143,463.44 and 65,678.14 is: 90,649.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,942.89 : 143,463.44 = 65,678.14 : x
  2. Step 2: Convert to fraction form
    103,942.89/143,463.44 = 65,678.14/x
  3. Step 3: Cross multiply
    103,942.89x = 143,463.44 × 65,678.14
  4. Step 4: Simplify right side
    103,942.89x = 9,422,412,240.73
  5. Step 5: Solve for x
    x = 9,422,412,240.73/103,942.89
  6. Step 6: Final answer
    x = 90,649.90

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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.