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Finding the Fourth Proportional to 65,390.44, 90,245.46 and 38,541.58

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Solution

The fourth proportional to 65,390.44, 90,245.46 and 38,541.58 is: 53,191.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,390.44 : 90,245.46 = 38,541.58 : x
  2. Step 2: Convert to fraction form
    65,390.44/90,245.46 = 38,541.58/x
  3. Step 3: Cross multiply
    65,390.44x = 90,245.46 × 38,541.58
  4. Step 4: Simplify right side
    65,390.44x = 3,478,202,616.23
  5. Step 5: Solve for x
    x = 3,478,202,616.23/65,390.44
  6. Step 6: Final answer
    x = 53,191.30

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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.