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Finding the Fourth Proportional to 65,560.75, 90,480.85 and 40,082.06

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Solution

The fourth proportional to 65,560.75, 90,480.85 and 40,082.06 is: 55,317.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,560.75 : 90,480.85 = 40,082.06 : x
  2. Step 2: Convert to fraction form
    65,560.75/90,480.85 = 40,082.06/x
  3. Step 3: Cross multiply
    65,560.75x = 90,480.85 × 40,082.06
  4. Step 4: Simplify right side
    65,560.75x = 3,626,658,984.55
  5. Step 5: Solve for x
    x = 3,626,658,984.55/65,560.75
  6. Step 6: Final answer
    x = 55,317.54

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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.