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Finding the Fourth Proportional to 64,589.52, 89,129.36 and 37,739.60

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Solution

The fourth proportional to 64,589.52, 89,129.36 and 37,739.60 is: 52,078.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,589.52 : 89,129.36 = 37,739.60 : x
  2. Step 2: Convert to fraction form
    64,589.52/89,129.36 = 37,739.60/x
  3. Step 3: Cross multiply
    64,589.52x = 89,129.36 × 37,739.60
  4. Step 4: Simplify right side
    64,589.52x = 3,363,706,394.66
  5. Step 5: Solve for x
    x = 3,363,706,394.66/64,589.52
  6. Step 6: Final answer
    x = 52,078.21

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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.