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Finding the Fourth Proportional to 65,880.79, 90,914.85 and 35,665.33

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Solution

The fourth proportional to 65,880.79, 90,914.85 and 35,665.33 is: 49,217.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,880.79 : 90,914.85 = 35,665.33 : x
  2. Step 2: Convert to fraction form
    65,880.79/90,914.85 = 35,665.33/x
  3. Step 3: Cross multiply
    65,880.79x = 90,914.85 × 35,665.33
  4. Step 4: Simplify right side
    65,880.79x = 3,242,508,127.15
  5. Step 5: Solve for x
    x = 3,242,508,127.15/65,880.79
  6. Step 6: Final answer
    x = 49,217.81

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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.