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Finding the Fourth Proportional to 142,707, 196,935.66 and 79,048.90

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Solution

The fourth proportional to 142,707, 196,935.66 and 79,048.90 is: 109,087.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,707 : 196,935.66 = 79,048.90 : x
  2. Step 2: Convert to fraction form
    142,707/196,935.66 = 79,048.90/x
  3. Step 3: Cross multiply
    142,707x = 196,935.66 × 79,048.90
  4. Step 4: Simplify right side
    142,707x = 15,567,546,801.43
  5. Step 5: Solve for x
    x = 15,567,546,801.43/142,707
  6. Step 6: Final answer
    x = 109,087.48

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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.