Home / 142,449.21-196,583.85-78,791.10

Finding the Fourth Proportional to 142,449.21, 196,583.85 and 78,791.10

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Solution

The fourth proportional to 142,449.21, 196,583.85 and 78,791.10 is: 108,733.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,449.21 : 196,583.85 = 78,791.10 : x
  2. Step 2: Convert to fraction form
    142,449.21/196,583.85 = 78,791.10/x
  3. Step 3: Cross multiply
    142,449.21x = 196,583.85 × 78,791.10
  4. Step 4: Simplify right side
    142,449.21x = 15,489,057,783.74
  5. Step 5: Solve for x
    x = 15,489,057,783.74/142,449.21
  6. Step 6: Final answer
    x = 108,733.90

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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.