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Finding the Fourth Proportional to 64,785.60, 97,221.60 and 36,705.60

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Solution

The fourth proportional to 64,785.60, 97,221.60 and 36,705.60 is: 55,082.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,785.60 : 97,221.60 = 36,705.60 : x
  2. Step 2: Convert to fraction form
    64,785.60/97,221.60 = 36,705.60/x
  3. Step 3: Cross multiply
    64,785.60x = 97,221.60 × 36,705.60
  4. Step 4: Simplify right side
    64,785.60x = 3,568,577,160.96
  5. Step 5: Solve for x
    x = 3,568,577,160.96/64,785.60
  6. Step 6: Final answer
    x = 55,082.88

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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.