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Finding the Fourth Proportional to 101,790.72, 140,471.55 and 56,469.60

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Solution

The fourth proportional to 101,790.72, 140,471.55 and 56,469.60 is: 77,928.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,790.72 : 140,471.55 = 56,469.60 : x
  2. Step 2: Convert to fraction form
    101,790.72/140,471.55 = 56,469.60/x
  3. Step 3: Cross multiply
    101,790.72x = 140,471.55 × 56,469.60
  4. Step 4: Simplify right side
    101,790.72x = 7,932,372,239.88
  5. Step 5: Solve for x
    x = 7,932,372,239.88/101,790.72
  6. Step 6: Final answer
    x = 77,928.25

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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.