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Finding the Fourth Proportional to 64,916.78, 97,375.17 and 15,668.78

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Solution

The fourth proportional to 64,916.78, 97,375.17 and 15,668.78 is: 23,503.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,916.78 : 97,375.17 = 15,668.78 : x
  2. Step 2: Convert to fraction form
    64,916.78/97,375.17 = 15,668.78/x
  3. Step 3: Cross multiply
    64,916.78x = 97,375.17 × 15,668.78
  4. Step 4: Simplify right side
    64,916.78x = 1,525,749,965.09
  5. Step 5: Solve for x
    x = 1,525,749,965.09/64,916.78
  6. Step 6: Final answer
    x = 23,503.17

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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.