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Finding the Fourth Proportional to 65,669.21, 90,625.67 and 36,989.40

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Solution

The fourth proportional to 65,669.21, 90,625.67 and 36,989.40 is: 51,046.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,669.21 : 90,625.67 = 36,989.40 : x
  2. Step 2: Convert to fraction form
    65,669.21/90,625.67 = 36,989.40/x
  3. Step 3: Cross multiply
    65,669.21x = 90,625.67 × 36,989.40
  4. Step 4: Simplify right side
    65,669.21x = 3,352,189,199.52
  5. Step 5: Solve for x
    x = 3,352,189,199.52/65,669.21
  6. Step 6: Final answer
    x = 51,046.59

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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.