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Finding the Fourth Proportional to 143,528.66, 198,064.66 and 79,865.09

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Solution

The fourth proportional to 143,528.66, 198,064.66 and 79,865.09 is: 110,211.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,528.66 : 198,064.66 = 79,865.09 : x
  2. Step 2: Convert to fraction form
    143,528.66/198,064.66 = 79,865.09/x
  3. Step 3: Cross multiply
    143,528.66x = 198,064.66 × 79,865.09
  4. Step 4: Simplify right side
    143,528.66x = 15,818,451,896.72
  5. Step 5: Solve for x
    x = 15,818,451,896.72/143,528.66
  6. Step 6: Final answer
    x = 110,211.10

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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.