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Finding the Fourth Proportional to 128,077.25, 192,125.10 and 49,191.48

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Solution

The fourth proportional to 128,077.25, 192,125.10 and 49,191.48 is: 73,790.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,077.25 : 192,125.10 = 49,191.48 : x
  2. Step 2: Convert to fraction form
    128,077.25/192,125.10 = 49,191.48/x
  3. Step 3: Cross multiply
    128,077.25x = 192,125.10 × 49,191.48
  4. Step 4: Simplify right side
    128,077.25x = 9,450,918,014.15
  5. Step 5: Solve for x
    x = 9,450,918,014.15/128,077.25
  6. Step 6: Final answer
    x = 73,790.77

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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.