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Finding the Fourth Proportional to 101,663.76, 140,344.20 and 67,728.81

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Solution

The fourth proportional to 101,663.76, 140,344.20 and 67,728.81 is: 93,497.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,663.76 : 140,344.20 = 67,728.81 : x
  2. Step 2: Convert to fraction form
    101,663.76/140,344.20 = 67,728.81/x
  3. Step 3: Cross multiply
    101,663.76x = 140,344.20 × 67,728.81
  4. Step 4: Simplify right side
    101,663.76x = 9,505,345,656.40
  5. Step 5: Solve for x
    x = 9,505,345,656.40/101,663.76
  6. Step 6: Final answer
    x = 93,497.88

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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.