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Finding the Fourth Proportional to 101,576.34, 140,128.81 and 65,777.88

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Solution

The fourth proportional to 101,576.34, 140,128.81 and 65,777.88 is: 90,743.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,576.34 : 140,128.81 = 65,777.88 : x
  2. Step 2: Convert to fraction form
    101,576.34/140,128.81 = 65,777.88/x
  3. Step 3: Cross multiply
    101,576.34x = 140,128.81 × 65,777.88
  4. Step 4: Simplify right side
    101,576.34x = 9,217,375,884.28
  5. Step 5: Solve for x
    x = 9,217,375,884.28/101,576.34
  6. Step 6: Final answer
    x = 90,743.34

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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.