Home / 142,179.68-196,206.88-78,516.96

Finding the Fourth Proportional to 142,179.68, 196,206.88 and 78,516.96

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Solution

The fourth proportional to 142,179.68, 196,206.88 and 78,516.96 is: 108,352.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,179.68 : 196,206.88 = 78,516.96 : x
  2. Step 2: Convert to fraction form
    142,179.68/196,206.88 = 78,516.96/x
  3. Step 3: Cross multiply
    142,179.68x = 196,206.88 × 78,516.96
  4. Step 4: Simplify right side
    142,179.68x = 15,405,567,748.68
  5. Step 5: Solve for x
    x = 15,405,567,748.68/142,179.68
  6. Step 6: Final answer
    x = 108,352.81

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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.