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Finding the Fourth Proportional to 143,352.96, 197,780.80 and 79,678.48

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Solution

The fourth proportional to 143,352.96, 197,780.80 and 79,678.48 is: 109,930.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,352.96 : 197,780.80 = 79,678.48 : x
  2. Step 2: Convert to fraction form
    143,352.96/197,780.80 = 79,678.48/x
  3. Step 3: Cross multiply
    143,352.96x = 197,780.80 × 79,678.48
  4. Step 4: Simplify right side
    143,352.96x = 15,758,873,517.18
  5. Step 5: Solve for x
    x = 15,758,873,517.18/143,352.96
  6. Step 6: Final answer
    x = 109,930.58

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1.5x scale

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.