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Finding the Fourth Proportional to 65,620.80, 90,500.40 and 41,738.40

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Solution

The fourth proportional to 65,620.80, 90,500.40 and 41,738.40 is: 57,563.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,620.80 : 90,500.40 = 41,738.40 : x
  2. Step 2: Convert to fraction form
    65,620.80/90,500.40 = 41,738.40/x
  3. Step 3: Cross multiply
    65,620.80x = 90,500.40 × 41,738.40
  4. Step 4: Simplify right side
    65,620.80x = 3,777,341,895.36
  5. Step 5: Solve for x
    x = 3,777,341,895.36/65,620.80
  6. Step 6: Final answer
    x = 57,563.18

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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.