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Finding the Fourth Proportional to 45,638.48, 62,978.85 and 25,491.35

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Solution

The fourth proportional to 45,638.48, 62,978.85 and 25,491.35 is: 35,176.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,638.48 : 62,978.85 = 25,491.35 : x
  2. Step 2: Convert to fraction form
    45,638.48/62,978.85 = 25,491.35/x
  3. Step 3: Cross multiply
    45,638.48x = 62,978.85 × 25,491.35
  4. Step 4: Simplify right side
    45,638.48x = 1,605,415,593.05
  5. Step 5: Solve for x
    x = 1,605,415,593.05/45,638.48
  6. Step 6: Final answer
    x = 35,176.80

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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.