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Finding the Fourth Proportional to 115,507.60, 173,131.80 and 65,611.60

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Solution

The fourth proportional to 115,507.60, 173,131.80 and 65,611.60 is: 98,343.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,507.60 : 173,131.80 = 65,611.60 : x
  2. Step 2: Convert to fraction form
    115,507.60/173,131.80 = 65,611.60/x
  3. Step 3: Cross multiply
    115,507.60x = 173,131.80 × 65,611.60
  4. Step 4: Simplify right side
    115,507.60x = 11,359,454,408.88
  5. Step 5: Solve for x
    x = 11,359,454,408.88/115,507.60
  6. Step 6: Final answer
    x = 98,343.78

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1.5x scale

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.