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Finding the Fourth Proportional to 65,190.89, 89,960.32 and 40,035.53

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Solution

The fourth proportional to 65,190.89, 89,960.32 and 40,035.53 is: 55,247.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,190.89 : 89,960.32 = 40,035.53 : x
  2. Step 2: Convert to fraction form
    65,190.89/89,960.32 = 40,035.53/x
  3. Step 3: Cross multiply
    65,190.89x = 89,960.32 × 40,035.53
  4. Step 4: Simplify right side
    65,190.89x = 3,601,609,365.11
  5. Step 5: Solve for x
    x = 3,601,609,365.11/65,190.89
  6. Step 6: Final answer
    x = 55,247.12

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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.