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Finding the Fourth Proportional to 77,636, 107,138.08 and 45,372.56

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Solution

The fourth proportional to 77,636, 107,138.08 and 45,372.56 is: 62,614.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,636 : 107,138.08 = 45,372.56 : x
  2. Step 2: Convert to fraction form
    77,636/107,138.08 = 45,372.56/x
  3. Step 3: Cross multiply
    77,636x = 107,138.08 × 45,372.56
  4. Step 4: Simplify right side
    77,636x = 4,861,128,963.08
  5. Step 5: Solve for x
    x = 4,861,128,963.08/77,636
  6. Step 6: Final answer
    x = 62,614.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.