Home / 143,107.24-197,419.38-100,689.16

Finding the Fourth Proportional to 143,107.24, 197,419.38 and 100,689.16

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Solution

The fourth proportional to 143,107.24, 197,419.38 and 100,689.16 is: 138,902.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,107.24 : 197,419.38 = 100,689.16 : x
  2. Step 2: Convert to fraction form
    143,107.24/197,419.38 = 100,689.16/x
  3. Step 3: Cross multiply
    143,107.24x = 197,419.38 × 100,689.16
  4. Step 4: Simplify right side
    143,107.24x = 19,877,991,539.92
  5. Step 5: Solve for x
    x = 19,877,991,539.92/143,107.24
  6. Step 6: Final answer
    x = 138,902.77

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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.