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Finding the Fourth Proportional to 143,382.52, 197,866.78 and 79,719.76

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Solution

The fourth proportional to 143,382.52, 197,866.78 and 79,719.76 is: 110,012.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,382.52 : 197,866.78 = 79,719.76 : x
  2. Step 2: Convert to fraction form
    143,382.52/197,866.78 = 79,719.76/x
  3. Step 3: Cross multiply
    143,382.52x = 197,866.78 × 79,719.76
  4. Step 4: Simplify right side
    143,382.52x = 15,773,892,213.57
  5. Step 5: Solve for x
    x = 15,773,892,213.57/143,382.52
  6. Step 6: Final answer
    x = 110,012.66

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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.