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Finding the Fourth Proportional to 120,062.43, 165,686.67 and 65,615.72

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Solution

The fourth proportional to 120,062.43, 165,686.67 and 65,615.72 is: 90,549.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,062.43 : 165,686.67 = 65,615.72 : x
  2. Step 2: Convert to fraction form
    120,062.43/165,686.67 = 65,615.72/x
  3. Step 3: Cross multiply
    120,062.43x = 165,686.67 × 65,615.72
  4. Step 4: Simplify right side
    120,062.43x = 10,871,649,318.02
  5. Step 5: Solve for x
    x = 10,871,649,318.02/120,062.43
  6. Step 6: Final answer
    x = 90,549.97

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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.