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Finding the Fourth Proportional to 65,420.77, 90,282.85 and 36,745.48

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Solution

The fourth proportional to 65,420.77, 90,282.85 and 36,745.48 is: 50,709.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,420.77 : 90,282.85 = 36,745.48 : x
  2. Step 2: Convert to fraction form
    65,420.77/90,282.85 = 36,745.48/x
  3. Step 3: Cross multiply
    65,420.77x = 90,282.85 × 36,745.48
  4. Step 4: Simplify right side
    65,420.77x = 3,317,486,659.02
  5. Step 5: Solve for x
    x = 3,317,486,659.02/65,420.77
  6. Step 6: Final answer
    x = 50,709.99

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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.