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Finding the Fourth Proportional to 143,376.71, 197,863.11 and 78,841.89

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Solution

The fourth proportional to 143,376.71, 197,863.11 and 78,841.89 is: 108,803.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,376.71 : 197,863.11 = 78,841.89 : x
  2. Step 2: Convert to fraction form
    143,376.71/197,863.11 = 78,841.89/x
  3. Step 3: Cross multiply
    143,376.71x = 197,863.11 × 78,841.89
  4. Step 4: Simplify right side
    143,376.71x = 15,599,900,170.15
  5. Step 5: Solve for x
    x = 15,599,900,170.15/143,376.71
  6. Step 6: Final answer
    x = 108,803.59

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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.