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Finding the Fourth Proportional to 102,908.43, 154,368.72 and 39,728.97

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Solution

The fourth proportional to 102,908.43, 154,368.72 and 39,728.97 is: 59,595.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,908.43 : 154,368.72 = 39,728.97 : x
  2. Step 2: Convert to fraction form
    102,908.43/154,368.72 = 39,728.97/x
  3. Step 3: Cross multiply
    102,908.43x = 154,368.72 × 39,728.97
  4. Step 4: Simplify right side
    102,908.43x = 6,132,910,245.82
  5. Step 5: Solve for x
    x = 6,132,910,245.82/102,908.43
  6. Step 6: Final answer
    x = 59,595.80

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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.