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Finding the Fourth Proportional to 90,290.94, 135,474.22 and 39,663.86

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Solution

The fourth proportional to 90,290.94, 135,474.22 and 39,663.86 is: 59,512.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,290.94 : 135,474.22 = 39,663.86 : x
  2. Step 2: Convert to fraction form
    90,290.94/135,474.22 = 39,663.86/x
  3. Step 3: Cross multiply
    90,290.94x = 135,474.22 × 39,663.86
  4. Step 4: Simplify right side
    90,290.94x = 5,373,429,644.79
  5. Step 5: Solve for x
    x = 5,373,429,644.79/90,290.94
  6. Step 6: Final answer
    x = 59,512.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.