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Finding the Fourth Proportional to 143,889.52, 198,564.81 and 79,364.76

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Solution

The fourth proportional to 143,889.52, 198,564.81 and 79,364.76 is: 109,521.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,889.52 : 198,564.81 = 79,364.76 : x
  2. Step 2: Convert to fraction form
    143,889.52/198,564.81 = 79,364.76/x
  3. Step 3: Cross multiply
    143,889.52x = 198,564.81 × 79,364.76
  4. Step 4: Simplify right side
    143,889.52x = 15,759,048,490.10
  5. Step 5: Solve for x
    x = 15,759,048,490.10/143,889.52
  6. Step 6: Final answer
    x = 109,521.86

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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.