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Finding the Fourth Proportional to 64,940.86, 97,389.42 and 52,431.22

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Solution

The fourth proportional to 64,940.86, 97,389.42 and 52,431.22 is: 78,629.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,940.86 : 97,389.42 = 52,431.22 : x
  2. Step 2: Convert to fraction form
    64,940.86/97,389.42 = 52,431.22/x
  3. Step 3: Cross multiply
    64,940.86x = 97,389.42 × 52,431.22
  4. Step 4: Simplify right side
    64,940.86x = 5,106,246,105.69
  5. Step 5: Solve for x
    x = 5,106,246,105.69/64,940.86
  6. Step 6: Final answer
    x = 78,629.17

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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.