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Finding the Fourth Proportional to 216,291, 324,436.50 and 68,547

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Solution

The fourth proportional to 216,291, 324,436.50 and 68,547 is: 102,820.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,291 : 324,436.50 = 68,547 : x
  2. Step 2: Convert to fraction form
    216,291/324,436.50 = 68,547/x
  3. Step 3: Cross multiply
    216,291x = 324,436.50 × 68,547
  4. Step 4: Simplify right side
    216,291x = 22,239,148,765.50
  5. Step 5: Solve for x
    x = 22,239,148,765.50/216,291
  6. Step 6: Final answer
    x = 102,820.50

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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.