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Finding the Fourth Proportional to 65,374.76, 90,213.36 and 36,691.76

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Solution

The fourth proportional to 65,374.76, 90,213.36 and 36,691.76 is: 50,632.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,374.76 : 90,213.36 = 36,691.76 : x
  2. Step 2: Convert to fraction form
    65,374.76/90,213.36 = 36,691.76/x
  3. Step 3: Cross multiply
    65,374.76x = 90,213.36 × 36,691.76
  4. Step 4: Simplify right side
    65,374.76x = 3,310,086,502.85
  5. Step 5: Solve for x
    x = 3,310,086,502.85/65,374.76
  6. Step 6: Final answer
    x = 50,632.49

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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.