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Finding the Fourth Proportional to 64,760.43, 89,344.81 and 39,257.49

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Solution

The fourth proportional to 64,760.43, 89,344.81 and 39,257.49 is: 54,160.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,760.43 : 89,344.81 = 39,257.49 : x
  2. Step 2: Convert to fraction form
    64,760.43/89,344.81 = 39,257.49/x
  3. Step 3: Cross multiply
    64,760.43x = 89,344.81 × 39,257.49
  4. Step 4: Simplify right side
    64,760.43x = 3,507,452,886.98
  5. Step 5: Solve for x
    x = 3,507,452,886.98/64,760.43
  6. Step 6: Final answer
    x = 54,160.43

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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.