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Finding the Fourth Proportional to 65,392.92, 90,245.20 and 38,536.56

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Solution

The fourth proportional to 65,392.92, 90,245.20 and 38,536.56 is: 53,182.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,392.92 : 90,245.20 = 38,536.56 : x
  2. Step 2: Convert to fraction form
    65,392.92/90,245.20 = 38,536.56/x
  3. Step 3: Cross multiply
    65,392.92x = 90,245.20 × 38,536.56
  4. Step 4: Simplify right side
    65,392.92x = 3,477,739,951.10
  5. Step 5: Solve for x
    x = 3,477,739,951.10/65,392.92
  6. Step 6: Final answer
    x = 53,182.21

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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.