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Finding the Fourth Proportional to 328,181.40, 492,272.10 and 78,863.40

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Solution

The fourth proportional to 328,181.40, 492,272.10 and 78,863.40 is: 118,295.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,181.40 : 492,272.10 = 78,863.40 : x
  2. Step 2: Convert to fraction form
    328,181.40/492,272.10 = 78,863.40/x
  3. Step 3: Cross multiply
    328,181.40x = 492,272.10 × 78,863.40
  4. Step 4: Simplify right side
    328,181.40x = 38,822,251,531.14
  5. Step 5: Solve for x
    x = 38,822,251,531.14/328,181.40
  6. Step 6: Final answer
    x = 118,295.10

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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.