Home / 143,784.35-198,423.19-83,390.81

Finding the Fourth Proportional to 143,784.35, 198,423.19 and 83,390.81

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Solution

The fourth proportional to 143,784.35, 198,423.19 and 83,390.81 is: 115,079.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,784.35 : 198,423.19 = 83,390.81 : x
  2. Step 2: Convert to fraction form
    143,784.35/198,423.19 = 83,390.81/x
  3. Step 3: Cross multiply
    143,784.35x = 198,423.19 × 83,390.81
  4. Step 4: Simplify right side
    143,784.35x = 16,546,669,649.01
  5. Step 5: Solve for x
    x = 16,546,669,649.01/143,784.35
  6. Step 6: Final answer
    x = 115,079.77

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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.