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Finding the Fourth Proportional to 120,118.62, 165,760.47 and 65,668.62

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Solution

The fourth proportional to 120,118.62, 165,760.47 and 65,668.62 is: 90,620.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,118.62 : 165,760.47 = 65,668.62 : x
  2. Step 2: Convert to fraction form
    120,118.62/165,760.47 = 65,668.62/x
  3. Step 3: Cross multiply
    120,118.62x = 165,760.47 × 65,668.62
  4. Step 4: Simplify right side
    120,118.62x = 10,885,261,315.45
  5. Step 5: Solve for x
    x = 10,885,261,315.45/120,118.62
  6. Step 6: Final answer
    x = 90,620.93

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1.5x scale

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.