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Finding the Fourth Proportional to 128,210.96, 192,334.64 and 39,471.84

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Solution

The fourth proportional to 128,210.96, 192,334.64 and 39,471.84 is: 59,213.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,210.96 : 192,334.64 = 39,471.84 : x
  2. Step 2: Convert to fraction form
    128,210.96/192,334.64 = 39,471.84/x
  3. Step 3: Cross multiply
    128,210.96x = 192,334.64 × 39,471.84
  4. Step 4: Simplify right side
    128,210.96x = 7,591,802,136.54
  5. Step 5: Solve for x
    x = 7,591,802,136.54/128,210.96
  6. Step 6: Final answer
    x = 59,213.36

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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.