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Finding the Fourth Proportional to 64,266.20, 96,629.70 and 54,128.60

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Solution

The fourth proportional to 64,266.20, 96,629.70 and 54,128.60 is: 81,386.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,266.20 : 96,629.70 = 54,128.60 : x
  2. Step 2: Convert to fraction form
    64,266.20/96,629.70 = 54,128.60/x
  3. Step 3: Cross multiply
    64,266.20x = 96,629.70 × 54,128.60
  4. Step 4: Simplify right side
    64,266.20x = 5,230,430,379.42
  5. Step 5: Solve for x
    x = 5,230,430,379.42/64,266.20
  6. Step 6: Final answer
    x = 81,386.96

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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.