Home / 120,402.45-166,139.64-69,417.09

Finding the Fourth Proportional to 120,402.45, 166,139.64 and 69,417.09

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Solution

The fourth proportional to 120,402.45, 166,139.64 and 69,417.09 is: 95,786.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,402.45 : 166,139.64 = 69,417.09 : x
  2. Step 2: Convert to fraction form
    120,402.45/166,139.64 = 69,417.09/x
  3. Step 3: Cross multiply
    120,402.45x = 166,139.64 × 69,417.09
  4. Step 4: Simplify right side
    120,402.45x = 11,532,930,342.45
  5. Step 5: Solve for x
    x = 11,532,930,342.45/120,402.45
  6. Step 6: Final answer
    x = 95,786.51

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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.