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Finding the Fourth Proportional to 143,345.97, 197,771.13 and 79,671.47

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Solution

The fourth proportional to 143,345.97, 197,771.13 and 79,671.47 is: 109,920.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,345.97 : 197,771.13 = 79,671.47 : x
  2. Step 2: Convert to fraction form
    143,345.97/197,771.13 = 79,671.47/x
  3. Step 3: Cross multiply
    143,345.97x = 197,771.13 × 79,671.47
  4. Step 4: Simplify right side
    143,345.97x = 15,756,715,661.81
  5. Step 5: Solve for x
    x = 15,756,715,661.81/143,345.97
  6. Step 6: Final answer
    x = 109,920.88

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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.