Home / 142,090.21-196,082.80-78,426.64

Finding the Fourth Proportional to 142,090.21, 196,082.80 and 78,426.64

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Solution

The fourth proportional to 142,090.21, 196,082.80 and 78,426.64 is: 108,227.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,090.21 : 196,082.80 = 78,426.64 : x
  2. Step 2: Convert to fraction form
    142,090.21/196,082.80 = 78,426.64/x
  3. Step 3: Cross multiply
    142,090.21x = 196,082.80 × 78,426.64
  4. Step 4: Simplify right side
    142,090.21x = 15,378,115,165.79
  5. Step 5: Solve for x
    x = 15,378,115,165.79/142,090.21
  6. Step 6: Final answer
    x = 108,227.83

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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.