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Finding the Fourth Proportional to 65,099.40, 89,845.47 and 36,420.66

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Solution

The fourth proportional to 65,099.40, 89,845.47 and 36,420.66 is: 50,265.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,099.40 : 89,845.47 = 36,420.66 : x
  2. Step 2: Convert to fraction form
    65,099.40/89,845.47 = 36,420.66/x
  3. Step 3: Cross multiply
    65,099.40x = 89,845.47 × 36,420.66
  4. Step 4: Simplify right side
    65,099.40x = 3,272,231,315.41
  5. Step 5: Solve for x
    x = 3,272,231,315.41/65,099.40
  6. Step 6: Final answer
    x = 50,265.15

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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.