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Finding the Fourth Proportional to 328,095.09, 492,211.26 and 138,555.90

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Solution

The fourth proportional to 328,095.09, 492,211.26 and 138,555.90 is: 207,862.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,095.09 : 492,211.26 = 138,555.90 : x
  2. Step 2: Convert to fraction form
    328,095.09/492,211.26 = 138,555.90/x
  3. Step 3: Cross multiply
    328,095.09x = 492,211.26 × 138,555.90
  4. Step 4: Simplify right side
    328,095.09x = 68,198,774,119.43
  5. Step 5: Solve for x
    x = 68,198,774,119.43/328,095.09
  6. Step 6: Final answer
    x = 207,862.83

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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.