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Finding the Fourth Proportional to 128,440.94, 192,756.05 and 60,973.21

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Solution

The fourth proportional to 128,440.94, 192,756.05 and 60,973.21 is: 91,504.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,440.94 : 192,756.05 = 60,973.21 : x
  2. Step 2: Convert to fraction form
    128,440.94/192,756.05 = 60,973.21/x
  3. Step 3: Cross multiply
    128,440.94x = 192,756.05 × 60,973.21
  4. Step 4: Simplify right side
    128,440.94x = 11,752,954,785.96
  5. Step 5: Solve for x
    x = 11,752,954,785.96/128,440.94
  6. Step 6: Final answer
    x = 91,504.74

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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.