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Finding the Fourth Proportional to 64,381.20, 96,802.20 and 54,243.60

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Solution

The fourth proportional to 64,381.20, 96,802.20 and 54,243.60 is: 81,559.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,381.20 : 96,802.20 = 54,243.60 : x
  2. Step 2: Convert to fraction form
    64,381.20/96,802.20 = 54,243.60/x
  3. Step 3: Cross multiply
    64,381.20x = 96,802.20 × 54,243.60
  4. Step 4: Simplify right side
    64,381.20x = 5,250,899,815.92
  5. Step 5: Solve for x
    x = 5,250,899,815.92/64,381.20
  6. Step 6: Final answer
    x = 81,559.52

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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.