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Finding the Fourth Proportional to 64,939.78, 97,409.67 and 53,129.98

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Solution

The fourth proportional to 64,939.78, 97,409.67 and 53,129.98 is: 79,694.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,939.78 : 97,409.67 = 53,129.98 : x
  2. Step 2: Convert to fraction form
    64,939.78/97,409.67 = 53,129.98/x
  3. Step 3: Cross multiply
    64,939.78x = 97,409.67 × 53,129.98
  4. Step 4: Simplify right side
    64,939.78x = 5,175,373,818.91
  5. Step 5: Solve for x
    x = 5,175,373,818.91/64,939.78
  6. Step 6: Final answer
    x = 79,694.97

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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.