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Finding the Fourth Proportional to 64,269.60, 96,408.98 and 19,890.64

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Solution

The fourth proportional to 64,269.60, 96,408.98 and 19,890.64 is: 29,837.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,269.60 : 96,408.98 = 19,890.64 : x
  2. Step 2: Convert to fraction form
    64,269.60/96,408.98 = 19,890.64/x
  3. Step 3: Cross multiply
    64,269.60x = 96,408.98 × 19,890.64
  4. Step 4: Simplify right side
    64,269.60x = 1,917,636,313.95
  5. Step 5: Solve for x
    x = 1,917,636,313.95/64,269.60
  6. Step 6: Final answer
    x = 29,837.38

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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.