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Finding the Fourth Proportional to 128,608.94, 192,945 and 103,873.16

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Solution

The fourth proportional to 128,608.94, 192,945 and 103,873.16 is: 155,835.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,608.94 : 192,945 = 103,873.16 : x
  2. Step 2: Convert to fraction form
    128,608.94/192,945 = 103,873.16/x
  3. Step 3: Cross multiply
    128,608.94x = 192,945 × 103,873.16
  4. Step 4: Simplify right side
    128,608.94x = 20,041,806,856.20
  5. Step 5: Solve for x
    x = 20,041,806,856.20/128,608.94
  6. Step 6: Final answer
    x = 155,835.25

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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.