Home / 142,135.76-196,147.64-78,473.68

Finding the Fourth Proportional to 142,135.76, 196,147.64 and 78,473.68

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Solution

The fourth proportional to 142,135.76, 196,147.64 and 78,473.68 is: 108,293.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,135.76 : 196,147.64 = 78,473.68 : x
  2. Step 2: Convert to fraction form
    142,135.76/196,147.64 = 78,473.68/x
  3. Step 3: Cross multiply
    142,135.76x = 196,147.64 × 78,473.68
  4. Step 4: Simplify right side
    142,135.76x = 15,392,427,134.12
  5. Step 5: Solve for x
    x = 15,392,427,134.12/142,135.76
  6. Step 6: Final answer
    x = 108,293.84

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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.