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Finding the Fourth Proportional to 65,820.61, 90,832.88 and 40,327.02

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Solution

The fourth proportional to 65,820.61, 90,832.88 and 40,327.02 is: 55,651.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,820.61 : 90,832.88 = 40,327.02 : x
  2. Step 2: Convert to fraction form
    65,820.61/90,832.88 = 40,327.02/x
  3. Step 3: Cross multiply
    65,820.61x = 90,832.88 × 40,327.02
  4. Step 4: Simplify right side
    65,820.61x = 3,663,019,469.24
  5. Step 5: Solve for x
    x = 3,663,019,469.24/65,820.61
  6. Step 6: Final answer
    x = 55,651.56

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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.