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Finding the Fourth Proportional to 64,021.35, 96,029.19 and 21,905.13

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Solution

The fourth proportional to 64,021.35, 96,029.19 and 21,905.13 is: 32,856.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,021.35 : 96,029.19 = 21,905.13 : x
  2. Step 2: Convert to fraction form
    64,021.35/96,029.19 = 21,905.13/x
  3. Step 3: Cross multiply
    64,021.35x = 96,029.19 × 21,905.13
  4. Step 4: Simplify right side
    64,021.35x = 2,103,531,890.74
  5. Step 5: Solve for x
    x = 2,103,531,890.74/64,021.35
  6. Step 6: Final answer
    x = 32,856.72

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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.