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Finding the Fourth Proportional to 143,374.66, 197,860.24 and 78,839.81

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Solution

The fourth proportional to 143,374.66, 197,860.24 and 78,839.81 is: 108,800.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,374.66 : 197,860.24 = 78,839.81 : x
  2. Step 2: Convert to fraction form
    143,374.66/197,860.24 = 78,839.81/x
  3. Step 3: Cross multiply
    143,374.66x = 197,860.24 × 78,839.81
  4. Step 4: Simplify right side
    143,374.66x = 15,599,262,738.85
  5. Step 5: Solve for x
    x = 15,599,262,738.85/143,374.66
  6. Step 6: Final answer
    x = 108,800.70

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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.