Home / 143,345.98-197,805.30-78,811.75

Finding the Fourth Proportional to 143,345.98, 197,805.30 and 78,811.75

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Solution

The fourth proportional to 143,345.98, 197,805.30 and 78,811.75 is: 108,753.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,345.98 : 197,805.30 = 78,811.75 : x
  2. Step 2: Convert to fraction form
    143,345.98/197,805.30 = 78,811.75/x
  3. Step 3: Cross multiply
    143,345.98x = 197,805.30 × 78,811.75
  4. Step 4: Simplify right side
    143,345.98x = 15,589,381,852.28
  5. Step 5: Solve for x
    x = 15,589,381,852.28/143,345.98
  6. Step 6: Final answer
    x = 108,753.53

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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.