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Finding the Fourth Proportional to 143,561.63, 198,111.67 and 79,898.06

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Solution

The fourth proportional to 143,561.63, 198,111.67 and 79,898.06 is: 110,257.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,561.63 : 198,111.67 = 79,898.06 : x
  2. Step 2: Convert to fraction form
    143,561.63/198,111.67 = 79,898.06/x
  3. Step 3: Cross multiply
    143,561.63x = 198,111.67 × 79,898.06
  4. Step 4: Simplify right side
    143,561.63x = 15,828,736,906.06
  5. Step 5: Solve for x
    x = 15,828,736,906.06/143,561.63
  6. Step 6: Final answer
    x = 110,257.44

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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.