Home / 143,277.86-197,713.85-78,745.70

Finding the Fourth Proportional to 143,277.86, 197,713.85 and 78,745.70

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Solution

The fourth proportional to 143,277.86, 197,713.85 and 78,745.70 is: 108,663.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,277.86 : 197,713.85 = 78,745.70 : x
  2. Step 2: Convert to fraction form
    143,277.86/197,713.85 = 78,745.70/x
  3. Step 3: Cross multiply
    143,277.86x = 197,713.85 × 78,745.70
  4. Step 4: Simplify right side
    143,277.86x = 15,569,115,618.50
  5. Step 5: Solve for x
    x = 15,569,115,618.50/143,277.86
  6. Step 6: Final answer
    x = 108,663.79

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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.