Home / 65,485.35-90,381.60-38,626.25

Finding the Fourth Proportional to 65,485.35, 90,381.60 and 38,626.25

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Solution

The fourth proportional to 65,485.35, 90,381.60 and 38,626.25 is: 53,311.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,485.35 : 90,381.60 = 38,626.25 : x
  2. Step 2: Convert to fraction form
    65,485.35/90,381.60 = 38,626.25/x
  3. Step 3: Cross multiply
    65,485.35x = 90,381.60 × 38,626.25
  4. Step 4: Simplify right side
    65,485.35x = 3,491,101,825.09
  5. Step 5: Solve for x
    x = 3,491,101,825.09/65,485.35
  6. Step 6: Final answer
    x = 53,311.19

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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.