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Finding the Fourth Proportional to 328,095.10, 492,081.90 and 91,388.80

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Solution

The fourth proportional to 328,095.10, 492,081.90 and 91,388.80 is: 137,066.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,095.10 : 492,081.90 = 91,388.80 : x
  2. Step 2: Convert to fraction form
    328,095.10/492,081.90 = 91,388.80/x
  3. Step 3: Cross multiply
    328,095.10x = 492,081.90 × 91,388.80
  4. Step 4: Simplify right side
    328,095.10x = 44,970,774,342.72
  5. Step 5: Solve for x
    x = 44,970,774,342.72/328,095.10
  6. Step 6: Final answer
    x = 137,066.28

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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.