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Finding the Fourth Proportional to 143,783.39, 198,421.29 and 80,119.82

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Solution

The fourth proportional to 143,783.39, 198,421.29 and 80,119.82 is: 110,565.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,783.39 : 198,421.29 = 80,119.82 : x
  2. Step 2: Convert to fraction form
    143,783.39/198,421.29 = 80,119.82/x
  3. Step 3: Cross multiply
    143,783.39x = 198,421.29 × 80,119.82
  4. Step 4: Simplify right side
    143,783.39x = 15,897,477,046.86
  5. Step 5: Solve for x
    x = 15,897,477,046.86/143,783.39
  6. Step 6: Final answer
    x = 110,565.47

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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.