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Finding the Fourth Proportional to 64,980.54, 89,679.17 and 39,481.03

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Solution

The fourth proportional to 64,980.54, 89,679.17 and 39,481.03 is: 54,487.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,980.54 : 89,679.17 = 39,481.03 : x
  2. Step 2: Convert to fraction form
    64,980.54/89,679.17 = 39,481.03/x
  3. Step 3: Cross multiply
    64,980.54x = 89,679.17 × 39,481.03
  4. Step 4: Simplify right side
    64,980.54x = 3,540,625,875.65
  5. Step 5: Solve for x
    x = 3,540,625,875.65/64,980.54
  6. Step 6: Final answer
    x = 54,487.48

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1.5x scale

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.