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Finding the Fourth Proportional to 64,391.84, 96,581.60 and 39,419.03

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Solution

The fourth proportional to 64,391.84, 96,581.60 and 39,419.03 is: 59,124.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,391.84 : 96,581.60 = 39,419.03 : x
  2. Step 2: Convert to fraction form
    64,391.84/96,581.60 = 39,419.03/x
  3. Step 3: Cross multiply
    64,391.84x = 96,581.60 × 39,419.03
  4. Step 4: Simplify right side
    64,391.84x = 3,807,153,180.03
  5. Step 5: Solve for x
    x = 3,807,153,180.03/64,391.84
  6. Step 6: Final answer
    x = 59,124.78

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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.