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Finding the Fourth Proportional to 128,361.79, 192,471.55 and 52,513.59

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Solution

The fourth proportional to 128,361.79, 192,471.55 and 52,513.59 is: 78,741.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,361.79 : 192,471.55 = 52,513.59 : x
  2. Step 2: Convert to fraction form
    128,361.79/192,471.55 = 52,513.59/x
  3. Step 3: Cross multiply
    128,361.79x = 192,471.55 × 52,513.59
  4. Step 4: Simplify right side
    128,361.79x = 10,107,372,063.36
  5. Step 5: Solve for x
    x = 10,107,372,063.36/128,361.79
  6. Step 6: Final answer
    x = 78,741.28

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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.