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Finding the Fourth Proportional to 64,205.55, 96,318.59 and 19,821.87

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Solution

The fourth proportional to 64,205.55, 96,318.59 and 19,821.87 is: 29,735.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,205.55 : 96,318.59 = 19,821.87 : x
  2. Step 2: Convert to fraction form
    64,205.55/96,318.59 = 19,821.87/x
  3. Step 3: Cross multiply
    64,205.55x = 96,318.59 × 19,821.87
  4. Step 4: Simplify right side
    64,205.55x = 1,909,214,470.45
  5. Step 5: Solve for x
    x = 1,909,214,470.45/64,205.55
  6. Step 6: Final answer
    x = 29,735.97

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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.