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Finding the Fourth Proportional to 65,893.50, 90,937.89 and 40,747.86

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Solution

The fourth proportional to 65,893.50, 90,937.89 and 40,747.86 is: 56,235.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,893.50 : 90,937.89 = 40,747.86 : x
  2. Step 2: Convert to fraction form
    65,893.50/90,937.89 = 40,747.86/x
  3. Step 3: Cross multiply
    65,893.50x = 90,937.89 × 40,747.86
  4. Step 4: Simplify right side
    65,893.50x = 3,705,524,410.42
  5. Step 5: Solve for x
    x = 3,705,524,410.42/65,893.50
  6. Step 6: Final answer
    x = 56,235.05

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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.