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Finding the Fourth Proportional to 143,165.07, 197,568.11 and 79,502.87

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Solution

The fourth proportional to 143,165.07, 197,568.11 and 79,502.87 is: 109,714.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,165.07 : 197,568.11 = 79,502.87 : x
  2. Step 2: Convert to fraction form
    143,165.07/197,568.11 = 79,502.87/x
  3. Step 3: Cross multiply
    143,165.07x = 197,568.11 × 79,502.87
  4. Step 4: Simplify right side
    143,165.07x = 15,707,231,346.83
  5. Step 5: Solve for x
    x = 15,707,231,346.83/143,165.07
  6. Step 6: Final answer
    x = 109,714.13

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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.