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Finding the Fourth Proportional to 64,291.72, 96,446.70 and 19,921.96

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Solution

The fourth proportional to 64,291.72, 96,446.70 and 19,921.96 is: 29,885.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,291.72 : 96,446.70 = 19,921.96 : x
  2. Step 2: Convert to fraction form
    64,291.72/96,446.70 = 19,921.96/x
  3. Step 3: Cross multiply
    64,291.72x = 96,446.70 × 19,921.96
  4. Step 4: Simplify right side
    64,291.72x = 1,921,407,299.53
  5. Step 5: Solve for x
    x = 1,921,407,299.53/64,291.72
  6. Step 6: Final answer
    x = 29,885.77

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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.