Home / 120,281.16-165,986.97-66,564.81

Finding the Fourth Proportional to 120,281.16, 165,986.97 and 66,564.81

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Solution

The fourth proportional to 120,281.16, 165,986.97 and 66,564.81 is: 91,858.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,281.16 : 165,986.97 = 66,564.81 : x
  2. Step 2: Convert to fraction form
    120,281.16/165,986.97 = 66,564.81/x
  3. Step 3: Cross multiply
    120,281.16x = 165,986.97 × 66,564.81
  4. Step 4: Simplify right side
    120,281.16x = 11,048,891,120.53
  5. Step 5: Solve for x
    x = 11,048,891,120.53/120,281.16
  6. Step 6: Final answer
    x = 91,858.87

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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.