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Finding the Fourth Proportional to 64,259.20, 96,619.20 and 54,121.60

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Solution

The fourth proportional to 64,259.20, 96,619.20 and 54,121.60 is: 81,376.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,259.20 : 96,619.20 = 54,121.60 : x
  2. Step 2: Convert to fraction form
    64,259.20/96,619.20 = 54,121.60/x
  3. Step 3: Cross multiply
    64,259.20x = 96,619.20 × 54,121.60
  4. Step 4: Simplify right side
    64,259.20x = 5,229,185,694.72
  5. Step 5: Solve for x
    x = 5,229,185,694.72/64,259.20
  6. Step 6: Final answer
    x = 81,376.45

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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.