Home / 143,908.20-198,588.78-78,494.58

Finding the Fourth Proportional to 143,908.20, 198,588.78 and 78,494.58

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Solution

The fourth proportional to 143,908.20, 198,588.78 and 78,494.58 is: 108,320.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,908.20 : 198,588.78 = 78,494.58 : x
  2. Step 2: Convert to fraction form
    143,908.20/198,588.78 = 78,494.58/x
  3. Step 3: Cross multiply
    143,908.20x = 198,588.78 × 78,494.58
  4. Step 4: Simplify right side
    143,908.20x = 15,588,142,878.81
  5. Step 5: Solve for x
    x = 15,588,142,878.81/143,908.20
  6. Step 6: Final answer
    x = 108,320.05

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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.