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Finding the Fourth Proportional to 120,122.91, 165,786.08 and 69,134.59

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Solution

The fourth proportional to 120,122.91, 165,786.08 and 69,134.59 is: 95,415.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,122.91 : 165,786.08 = 69,134.59 : x
  2. Step 2: Convert to fraction form
    120,122.91/165,786.08 = 69,134.59/x
  3. Step 3: Cross multiply
    120,122.91x = 165,786.08 × 69,134.59
  4. Step 4: Simplify right side
    120,122.91x = 11,461,552,530.07
  5. Step 5: Solve for x
    x = 11,461,552,530.07/120,122.91
  6. Step 6: Final answer
    x = 95,415.21

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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.