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Finding the Fourth Proportional to 65,145.74, 89,902.78 and 38,289.68

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Solution

The fourth proportional to 65,145.74, 89,902.78 and 38,289.68 is: 52,840.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,145.74 : 89,902.78 = 38,289.68 : x
  2. Step 2: Convert to fraction form
    65,145.74/89,902.78 = 38,289.68/x
  3. Step 3: Cross multiply
    65,145.74x = 89,902.78 × 38,289.68
  4. Step 4: Simplify right side
    65,145.74x = 3,442,348,469.21
  5. Step 5: Solve for x
    x = 3,442,348,469.21/65,145.74
  6. Step 6: Final answer
    x = 52,840.73

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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.