Home / 120,140.29-165,786.90-66,422.17

Finding the Fourth Proportional to 120,140.29, 165,786.90 and 66,422.17

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Solution

The fourth proportional to 120,140.29, 165,786.90 and 66,422.17 is: 91,658.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,140.29 : 165,786.90 = 66,422.17 : x
  2. Step 2: Convert to fraction form
    120,140.29/165,786.90 = 66,422.17/x
  3. Step 3: Cross multiply
    120,140.29x = 165,786.90 × 66,422.17
  4. Step 4: Simplify right side
    120,140.29x = 11,011,924,826.64
  5. Step 5: Solve for x
    x = 11,011,924,826.64/120,140.29
  6. Step 6: Final answer
    x = 91,658.89

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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.