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Finding the Fourth Proportional to 64,657.74, 89,239.98 and 40,469.94

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Solution

The fourth proportional to 64,657.74, 89,239.98 and 40,469.94 is: 55,856.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,657.74 : 89,239.98 = 40,469.94 : x
  2. Step 2: Convert to fraction form
    64,657.74/89,239.98 = 40,469.94/x
  3. Step 3: Cross multiply
    64,657.74x = 89,239.98 × 40,469.94
  4. Step 4: Simplify right side
    64,657.74x = 3,611,536,636.20
  5. Step 5: Solve for x
    x = 3,611,536,636.20/64,657.74
  6. Step 6: Final answer
    x = 55,856.22

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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.