Home / 142,031.62-196,007.72-78,373.52

Finding the Fourth Proportional to 142,031.62, 196,007.72 and 78,373.52

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Solution

The fourth proportional to 142,031.62, 196,007.72 and 78,373.52 is: 108,157.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,031.62 : 196,007.72 = 78,373.52 : x
  2. Step 2: Convert to fraction form
    142,031.62/196,007.72 = 78,373.52/x
  3. Step 3: Cross multiply
    142,031.62x = 196,007.72 × 78,373.52
  4. Step 4: Simplify right side
    142,031.62x = 15,361,814,571.71
  5. Step 5: Solve for x
    x = 15,361,814,571.71/142,031.62
  6. Step 6: Final answer
    x = 108,157.71

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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.