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Finding the Fourth Proportional to 143,187.75, 197,599.10 and 79,531.47

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Solution

The fourth proportional to 143,187.75, 197,599.10 and 79,531.47 is: 109,753.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,187.75 : 197,599.10 = 79,531.47 : x
  2. Step 2: Convert to fraction form
    143,187.75/197,599.10 = 79,531.47/x
  3. Step 3: Cross multiply
    143,187.75x = 197,599.10 × 79,531.47
  4. Step 4: Simplify right side
    143,187.75x = 15,715,346,496.02
  5. Step 5: Solve for x
    x = 15,715,346,496.02/143,187.75
  6. Step 6: Final answer
    x = 109,753.43

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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.