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Finding the Fourth Proportional to 64,812.24, 89,388 and 54,423.90

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Solution

The fourth proportional to 64,812.24, 89,388 and 54,423.90 is: 75,060.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,812.24 : 89,388 = 54,423.90 : x
  2. Step 2: Convert to fraction form
    64,812.24/89,388 = 54,423.90/x
  3. Step 3: Cross multiply
    64,812.24x = 89,388 × 54,423.90
  4. Step 4: Simplify right side
    64,812.24x = 4,864,843,573.20
  5. Step 5: Solve for x
    x = 4,864,843,573.20/64,812.24
  6. Step 6: Final answer
    x = 75,060.57

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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.