Home / 105,991.32-159,018.78-42,778.92

Finding the Fourth Proportional to 105,991.32, 159,018.78 and 42,778.92

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Solution

The fourth proportional to 105,991.32, 159,018.78 and 42,778.92 is: 64,181.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,991.32 : 159,018.78 = 42,778.92 : x
  2. Step 2: Convert to fraction form
    105,991.32/159,018.78 = 42,778.92/x
  3. Step 3: Cross multiply
    105,991.32x = 159,018.78 × 42,778.92
  4. Step 4: Simplify right side
    105,991.32x = 6,802,651,668.12
  5. Step 5: Solve for x
    x = 6,802,651,668.12/105,991.32
  6. Step 6: Final answer
    x = 64,181.21

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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.