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Finding the Fourth Proportional to 64,818.72, 89,415.68 and 44,640.64

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Solution

The fourth proportional to 64,818.72, 89,415.68 and 44,640.64 is: 61,580.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,818.72 : 89,415.68 = 44,640.64 : x
  2. Step 2: Convert to fraction form
    64,818.72/89,415.68 = 44,640.64/x
  3. Step 3: Cross multiply
    64,818.72x = 89,415.68 × 44,640.64
  4. Step 4: Simplify right side
    64,818.72x = 3,991,573,181.24
  5. Step 5: Solve for x
    x = 3,991,573,181.24/64,818.72
  6. Step 6: Final answer
    x = 61,580.56

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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.