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Finding the Fourth Proportional to 142,992.09, 197,352.71 and 79,350.39

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Solution

The fourth proportional to 142,992.09, 197,352.71 and 79,350.39 is: 109,516.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,992.09 : 197,352.71 = 79,350.39 : x
  2. Step 2: Convert to fraction form
    142,992.09/197,352.71 = 79,350.39/x
  3. Step 3: Cross multiply
    142,992.09x = 197,352.71 × 79,350.39
  4. Step 4: Simplify right side
    142,992.09x = 15,660,014,506.06
  5. Step 5: Solve for x
    x = 15,660,014,506.06/142,992.09
  6. Step 6: Final answer
    x = 109,516.65

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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.