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Finding the Fourth Proportional to 65,475.26, 90,351.60 and 38,611.60

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Solution

The fourth proportional to 65,475.26, 90,351.60 and 38,611.60 is: 53,281.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,475.26 : 90,351.60 = 38,611.60 : x
  2. Step 2: Convert to fraction form
    65,475.26/90,351.60 = 38,611.60/x
  3. Step 3: Cross multiply
    65,475.26x = 90,351.60 × 38,611.60
  4. Step 4: Simplify right side
    65,475.26x = 3,488,619,838.56
  5. Step 5: Solve for x
    x = 3,488,619,838.56/65,475.26
  6. Step 6: Final answer
    x = 53,281.50

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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.