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Finding the Fourth Proportional to 128,415.36, 192,630.96 and 49,528.56

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Solution

The fourth proportional to 128,415.36, 192,630.96 and 49,528.56 is: 74,295.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,415.36 : 192,630.96 = 49,528.56 : x
  2. Step 2: Convert to fraction form
    128,415.36/192,630.96 = 49,528.56/x
  3. Step 3: Cross multiply
    128,415.36x = 192,630.96 × 49,528.56
  4. Step 4: Simplify right side
    128,415.36x = 9,540,734,060.22
  5. Step 5: Solve for x
    x = 9,540,734,060.22/128,415.36
  6. Step 6: Final answer
    x = 74,295.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.