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Finding the Fourth Proportional to 120,109.77, 165,749.04 and 66,397.05

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Solution

The fourth proportional to 120,109.77, 165,749.04 and 66,397.05 is: 91,626.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,109.77 : 165,749.04 = 66,397.05 : x
  2. Step 2: Convert to fraction form
    120,109.77/165,749.04 = 66,397.05/x
  3. Step 3: Cross multiply
    120,109.77x = 165,749.04 × 66,397.05
  4. Step 4: Simplify right side
    120,109.77x = 11,005,247,296.33
  5. Step 5: Solve for x
    x = 11,005,247,296.33/120,109.77
  6. Step 6: Final answer
    x = 91,626.58

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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.