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Finding the Fourth Proportional to 101,570.79, 140,121.17 and 65,772.34

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Solution

The fourth proportional to 101,570.79, 140,121.17 and 65,772.34 is: 90,735.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,570.79 : 140,121.17 = 65,772.34 : x
  2. Step 2: Convert to fraction form
    101,570.79/140,121.17 = 65,772.34/x
  3. Step 3: Cross multiply
    101,570.79x = 140,121.17 × 65,772.34
  4. Step 4: Simplify right side
    101,570.79x = 9,216,096,801.92
  5. Step 5: Solve for x
    x = 9,216,096,801.92/101,570.79
  6. Step 6: Final answer
    x = 90,735.70

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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.