Home / 143,443.14-197,948.55-78,909.66

Finding the Fourth Proportional to 143,443.14, 197,948.55 and 78,909.66

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Solution

The fourth proportional to 143,443.14, 197,948.55 and 78,909.66 is: 108,893.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,443.14 : 197,948.55 = 78,909.66 : x
  2. Step 2: Convert to fraction form
    143,443.14/197,948.55 = 78,909.66/x
  3. Step 3: Cross multiply
    143,443.14x = 197,948.55 × 78,909.66
  4. Step 4: Simplify right side
    143,443.14x = 15,620,052,777.99
  5. Step 5: Solve for x
    x = 15,620,052,777.99/143,443.14
  6. Step 6: Final answer
    x = 108,893.69

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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.