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Finding the Fourth Proportional to 84,930.72, 127,396.08 and 38,128.92

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Solution

The fourth proportional to 84,930.72, 127,396.08 and 38,128.92 is: 57,193.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,930.72 : 127,396.08 = 38,128.92 : x
  2. Step 2: Convert to fraction form
    84,930.72/127,396.08 = 38,128.92/x
  3. Step 3: Cross multiply
    84,930.72x = 127,396.08 × 38,128.92
  4. Step 4: Simplify right side
    84,930.72x = 4,857,474,942.63
  5. Step 5: Solve for x
    x = 4,857,474,942.63/84,930.72
  6. Step 6: Final answer
    x = 57,193.38

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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.