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Finding the Fourth Proportional to 101,538.50, 140,103.68 and 65,723.54

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Solution

The fourth proportional to 101,538.50, 140,103.68 and 65,723.54 is: 90,685.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,538.50 : 140,103.68 = 65,723.54 : x
  2. Step 2: Convert to fraction form
    101,538.50/140,103.68 = 65,723.54/x
  3. Step 3: Cross multiply
    101,538.50x = 140,103.68 × 65,723.54
  4. Step 4: Simplify right side
    101,538.50x = 9,208,109,816.63
  5. Step 5: Solve for x
    x = 9,208,109,816.63/101,538.50
  6. Step 6: Final answer
    x = 90,685.90

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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.