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Finding the Fourth Proportional to 216,415.30, 324,657.83 and 66,655.54

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Solution

The fourth proportional to 216,415.30, 324,657.83 and 66,655.54 is: 99,994.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,415.30 : 324,657.83 = 66,655.54 : x
  2. Step 2: Convert to fraction form
    216,415.30/324,657.83 = 66,655.54/x
  3. Step 3: Cross multiply
    216,415.30x = 324,657.83 × 66,655.54
  4. Step 4: Simplify right side
    216,415.30x = 21,640,242,640.60
  5. Step 5: Solve for x
    x = 21,640,242,640.60/216,415.30
  6. Step 6: Final answer
    x = 99,994.05

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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.