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Finding the Fourth Proportional to 128,243.21, 192,364.82 and 34,748.96

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Solution

The fourth proportional to 128,243.21, 192,364.82 and 34,748.96 is: 52,123.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,243.21 : 192,364.82 = 34,748.96 : x
  2. Step 2: Convert to fraction form
    128,243.21/192,364.82 = 34,748.96/x
  3. Step 3: Cross multiply
    128,243.21x = 192,364.82 × 34,748.96
  4. Step 4: Simplify right side
    128,243.21x = 6,684,476,300.02
  5. Step 5: Solve for x
    x = 6,684,476,300.02/128,243.21
  6. Step 6: Final answer
    x = 52,123.43

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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.