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Finding the Fourth Proportional to 64,939.53, 97,409.30 and 53,129.73

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Solution

The fourth proportional to 64,939.53, 97,409.30 and 53,129.73 is: 79,694.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,939.53 : 97,409.30 = 53,129.73 : x
  2. Step 2: Convert to fraction form
    64,939.53/97,409.30 = 53,129.73/x
  3. Step 3: Cross multiply
    64,939.53x = 97,409.30 × 53,129.73
  4. Step 4: Simplify right side
    64,939.53x = 5,175,329,542.84
  5. Step 5: Solve for x
    x = 5,175,329,542.84/64,939.53
  6. Step 6: Final answer
    x = 79,694.60

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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.