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Finding the Fourth Proportional to 238,917, 358,375.50 and 72,705

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Solution

The fourth proportional to 238,917, 358,375.50 and 72,705 is: 109,057.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,917 : 358,375.50 = 72,705 : x
  2. Step 2: Convert to fraction form
    238,917/358,375.50 = 72,705/x
  3. Step 3: Cross multiply
    238,917x = 358,375.50 × 72,705
  4. Step 4: Simplify right side
    238,917x = 26,055,690,727.50
  5. Step 5: Solve for x
    x = 26,055,690,727.50/238,917
  6. Step 6: Final answer
    x = 109,057.50

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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.