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Finding the Fourth Proportional to 64,518.40, 96,662.40 and 54,611.20

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Solution

The fourth proportional to 64,518.40, 96,662.40 and 54,611.20 is: 81,819.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,518.40 : 96,662.40 = 54,611.20 : x
  2. Step 2: Convert to fraction form
    64,518.40/96,662.40 = 54,611.20/x
  3. Step 3: Cross multiply
    64,518.40x = 96,662.40 × 54,611.20
  4. Step 4: Simplify right side
    64,518.40x = 5,278,849,658.88
  5. Step 5: Solve for x
    x = 5,278,849,658.88/64,518.40
  6. Step 6: Final answer
    x = 81,819.29

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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.