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Finding the Fourth Proportional to 143,402.67, 197,887.56 and 79,739.10

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Solution

The fourth proportional to 143,402.67, 197,887.56 and 79,739.10 is: 110,035.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,402.67 : 197,887.56 = 79,739.10 : x
  2. Step 2: Convert to fraction form
    143,402.67/197,887.56 = 79,739.10/x
  3. Step 3: Cross multiply
    143,402.67x = 197,887.56 × 79,739.10
  4. Step 4: Simplify right side
    143,402.67x = 15,779,375,636.57
  5. Step 5: Solve for x
    x = 15,779,375,636.57/143,402.67
  6. Step 6: Final answer
    x = 110,035.44

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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.