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Finding the Fourth Proportional to 65,046.72, 97,578.36 and 20,657.64

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Solution

The fourth proportional to 65,046.72, 97,578.36 and 20,657.64 is: 30,989.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,046.72 : 97,578.36 = 20,657.64 : x
  2. Step 2: Convert to fraction form
    65,046.72/97,578.36 = 20,657.64/x
  3. Step 3: Cross multiply
    65,046.72x = 97,578.36 × 20,657.64
  4. Step 4: Simplify right side
    65,046.72x = 2,015,738,632.67
  5. Step 5: Solve for x
    x = 2,015,738,632.67/65,046.72
  6. Step 6: Final answer
    x = 30,989.09

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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.