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Finding the Fourth Proportional to 65,877.79, 90,910.60 and 35,662.45

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Solution

The fourth proportional to 65,877.79, 90,910.60 and 35,662.45 is: 49,213.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,877.79 : 90,910.60 = 35,662.45 : x
  2. Step 2: Convert to fraction form
    65,877.79/90,910.60 = 35,662.45/x
  3. Step 3: Cross multiply
    65,877.79x = 90,910.60 × 35,662.45
  4. Step 4: Simplify right side
    65,877.79x = 3,242,094,954.25
  5. Step 5: Solve for x
    x = 3,242,094,954.25/65,877.79
  6. Step 6: Final answer
    x = 49,213.78

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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.