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Finding the Fourth Proportional to 65,470.88, 90,361.59 and 38,611.82

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Solution

The fourth proportional to 65,470.88, 90,361.59 and 38,611.82 is: 53,291.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,470.88 : 90,361.59 = 38,611.82 : x
  2. Step 2: Convert to fraction form
    65,470.88/90,361.59 = 38,611.82/x
  3. Step 3: Cross multiply
    65,470.88x = 90,361.59 × 38,611.82
  4. Step 4: Simplify right side
    65,470.88x = 3,489,025,447.99
  5. Step 5: Solve for x
    x = 3,489,025,447.99/65,470.88
  6. Step 6: Final answer
    x = 53,291.26

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1.5x scale

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.