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Finding the Fourth Proportional to 143,338.14, 197,813.34 and 79,677

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Solution

The fourth proportional to 143,338.14, 197,813.34 and 79,677 is: 109,957.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,338.14 : 197,813.34 = 79,677 : x
  2. Step 2: Convert to fraction form
    143,338.14/197,813.34 = 79,677/x
  3. Step 3: Cross multiply
    143,338.14x = 197,813.34 × 79,677
  4. Step 4: Simplify right side
    143,338.14x = 15,761,173,491.18
  5. Step 5: Solve for x
    x = 15,761,173,491.18/143,338.14
  6. Step 6: Final answer
    x = 109,957.99

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1.5x scale

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.