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Finding the Fourth Proportional to 64,759.65, 97,138.90 and 18,012.39

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Solution

The fourth proportional to 64,759.65, 97,138.90 and 18,012.39 is: 27,018.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,759.65 : 97,138.90 = 18,012.39 : x
  2. Step 2: Convert to fraction form
    64,759.65/97,138.90 = 18,012.39/x
  3. Step 3: Cross multiply
    64,759.65x = 97,138.90 × 18,012.39
  4. Step 4: Simplify right side
    64,759.65x = 1,749,703,750.97
  5. Step 5: Solve for x
    x = 1,749,703,750.97/64,759.65
  6. Step 6: Final answer
    x = 27,018.43

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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.