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Finding the Fourth Proportional to 128,688.94, 192,919.22 and 48,670.94

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Solution

The fourth proportional to 128,688.94, 192,919.22 and 48,670.94 is: 72,963.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,688.94 : 192,919.22 = 48,670.94 : x
  2. Step 2: Convert to fraction form
    128,688.94/192,919.22 = 48,670.94/x
  3. Step 3: Cross multiply
    128,688.94x = 192,919.22 × 48,670.94
  4. Step 4: Simplify right side
    128,688.94x = 9,389,560,202.93
  5. Step 5: Solve for x
    x = 9,389,560,202.93/128,688.94
  6. Step 6: Final answer
    x = 72,963.22

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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.