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Finding the Fourth Proportional to 64,601.85, 96,921.60 and 39,657.90

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Solution

The fourth proportional to 64,601.85, 96,921.60 and 39,657.90 is: 59,498.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,601.85 : 96,921.60 = 39,657.90 : x
  2. Step 2: Convert to fraction form
    64,601.85/96,921.60 = 39,657.90/x
  3. Step 3: Cross multiply
    64,601.85x = 96,921.60 × 39,657.90
  4. Step 4: Simplify right side
    64,601.85x = 3,843,707,120.64
  5. Step 5: Solve for x
    x = 3,843,707,120.64/64,601.85
  6. Step 6: Final answer
    x = 59,498.41

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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.