Home / 142,031.70-196,007.83-78,373.60

Finding the Fourth Proportional to 142,031.70, 196,007.83 and 78,373.60

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Solution

The fourth proportional to 142,031.70, 196,007.83 and 78,373.60 is: 108,157.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,031.70 : 196,007.83 = 78,373.60 : x
  2. Step 2: Convert to fraction form
    142,031.70/196,007.83 = 78,373.60/x
  3. Step 3: Cross multiply
    142,031.70x = 196,007.83 × 78,373.60
  4. Step 4: Simplify right side
    142,031.70x = 15,361,838,579.33
  5. Step 5: Solve for x
    x = 15,361,838,579.33/142,031.70
  6. Step 6: Final answer
    x = 108,157.82

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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.