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Finding the Fourth Proportional to 65,399.72, 90,223.62 and 51,195.56

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Solution

The fourth proportional to 65,399.72, 90,223.62 and 51,195.56 is: 70,627.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,399.72 : 90,223.62 = 51,195.56 : x
  2. Step 2: Convert to fraction form
    65,399.72/90,223.62 = 51,195.56/x
  3. Step 3: Cross multiply
    65,399.72x = 90,223.62 × 51,195.56
  4. Step 4: Simplify right side
    65,399.72x = 4,619,048,751.13
  5. Step 5: Solve for x
    x = 4,619,048,751.13/65,399.72
  6. Step 6: Final answer
    x = 70,627.96

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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.