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Finding the Fourth Proportional to 64,405.96, 89,044.50 and 48,571.72

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Solution

The fourth proportional to 64,405.96, 89,044.50 and 48,571.72 is: 67,152.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,405.96 : 89,044.50 = 48,571.72 : x
  2. Step 2: Convert to fraction form
    64,405.96/89,044.50 = 48,571.72/x
  3. Step 3: Cross multiply
    64,405.96x = 89,044.50 × 48,571.72
  4. Step 4: Simplify right side
    64,405.96x = 4,325,044,521.54
  5. Step 5: Solve for x
    x = 4,325,044,521.54/64,405.96
  6. Step 6: Final answer
    x = 67,152.86

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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.