Home / 143,989.07-198,700.27-78,575.39

Finding the Fourth Proportional to 143,989.07, 198,700.27 and 78,575.39

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Solution

The fourth proportional to 143,989.07, 198,700.27 and 78,575.39 is: 108,431.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,989.07 : 198,700.27 = 78,575.39 : x
  2. Step 2: Convert to fraction form
    143,989.07/198,700.27 = 78,575.39/x
  3. Step 3: Cross multiply
    143,989.07x = 198,700.27 × 78,575.39
  4. Step 4: Simplify right side
    143,989.07x = 15,612,951,208.36
  5. Step 5: Solve for x
    x = 15,612,951,208.36/143,989.07
  6. Step 6: Final answer
    x = 108,431.50

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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.