Home / 142,636.87-196,845.03-78,974.66

Finding the Fourth Proportional to 142,636.87, 196,845.03 and 78,974.66

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Solution

The fourth proportional to 142,636.87, 196,845.03 and 78,974.66 is: 108,988.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,636.87 : 196,845.03 = 78,974.66 : x
  2. Step 2: Convert to fraction form
    142,636.87/196,845.03 = 78,974.66/x
  3. Step 3: Cross multiply
    142,636.87x = 196,845.03 × 78,974.66
  4. Step 4: Simplify right side
    142,636.87x = 15,545,767,937.84
  5. Step 5: Solve for x
    x = 15,545,767,937.84/142,636.87
  6. Step 6: Final answer
    x = 108,988.43

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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.