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Finding the Fourth Proportional to 128,300.78, 192,428.49 and 34,813.82

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Solution

The fourth proportional to 128,300.78, 192,428.49 and 34,813.82 is: 52,214.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,300.78 : 192,428.49 = 34,813.82 : x
  2. Step 2: Convert to fraction form
    128,300.78/192,428.49 = 34,813.82/x
  3. Step 3: Cross multiply
    128,300.78x = 192,428.49 × 34,813.82
  4. Step 4: Simplify right side
    128,300.78x = 6,699,170,813.73
  5. Step 5: Solve for x
    x = 6,699,170,813.73/128,300.78
  6. Step 6: Final answer
    x = 52,214.58

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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.