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Finding the Fourth Proportional to 120,062.90, 165,687.32 and 65,616.18

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Solution

The fourth proportional to 120,062.90, 165,687.32 and 65,616.18 is: 90,550.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,062.90 : 165,687.32 = 65,616.18 : x
  2. Step 2: Convert to fraction form
    120,062.90/165,687.32 = 65,616.18/x
  3. Step 3: Cross multiply
    120,062.90x = 165,687.32 × 65,616.18
  4. Step 4: Simplify right side
    120,062.90x = 10,871,769,552.14
  5. Step 5: Solve for x
    x = 10,871,769,552.14/120,062.90
  6. Step 6: Final answer
    x = 90,550.62

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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.