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Finding the Fourth Proportional to 64,989.88, 89,680.58 and 38,129.56

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Solution

The fourth proportional to 64,989.88, 89,680.58 and 38,129.56 is: 52,615.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,989.88 : 89,680.58 = 38,129.56 : x
  2. Step 2: Convert to fraction form
    64,989.88/89,680.58 = 38,129.56/x
  3. Step 3: Cross multiply
    64,989.88x = 89,680.58 × 38,129.56
  4. Step 4: Simplify right side
    64,989.88x = 3,419,481,055.94
  5. Step 5: Solve for x
    x = 3,419,481,055.94/64,989.88
  6. Step 6: Final answer
    x = 52,615.59

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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.