Home / 142,102.64-196,101.68-78,440.48

Finding the Fourth Proportional to 142,102.64, 196,101.68 and 78,440.48

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Solution

The fourth proportional to 142,102.64, 196,101.68 and 78,440.48 is: 108,247.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,102.64 : 196,101.68 = 78,440.48 : x
  2. Step 2: Convert to fraction form
    142,102.64/196,101.68 = 78,440.48/x
  3. Step 3: Cross multiply
    142,102.64x = 196,101.68 × 78,440.48
  4. Step 4: Simplify right side
    142,102.64x = 15,382,309,908.01
  5. Step 5: Solve for x
    x = 15,382,309,908.01/142,102.64
  6. Step 6: Final answer
    x = 108,247.88

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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.