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Finding the Fourth Proportional to 64,899.72, 97,355.05 and 20,525.49

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Solution

The fourth proportional to 64,899.72, 97,355.05 and 20,525.49 is: 30,789.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,899.72 : 97,355.05 = 20,525.49 : x
  2. Step 2: Convert to fraction form
    64,899.72/97,355.05 = 20,525.49/x
  3. Step 3: Cross multiply
    64,899.72x = 97,355.05 × 20,525.49
  4. Step 4: Simplify right side
    64,899.72x = 1,998,260,053.91
  5. Step 5: Solve for x
    x = 1,998,260,053.91/64,899.72
  6. Step 6: Final answer
    x = 30,789.96

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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.