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Finding the Fourth Proportional to 328,486.16, 492,724.92 and 79,166

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Solution

The fourth proportional to 328,486.16, 492,724.92 and 79,166 is: 118,747.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,486.16 : 492,724.92 = 79,166 : x
  2. Step 2: Convert to fraction form
    328,486.16/492,724.92 = 79,166/x
  3. Step 3: Cross multiply
    328,486.16x = 492,724.92 × 79,166
  4. Step 4: Simplify right side
    328,486.16x = 39,007,061,016.72
  5. Step 5: Solve for x
    x = 39,007,061,016.72/328,486.16
  6. Step 6: Final answer
    x = 118,747.96

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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.