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Finding the Fourth Proportional to 216,709.12, 325,094.78 and 66,962.48

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Solution

The fourth proportional to 216,709.12, 325,094.78 and 66,962.48 is: 100,453.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,709.12 : 325,094.78 = 66,962.48 : x
  2. Step 2: Convert to fraction form
    216,709.12/325,094.78 = 66,962.48/x
  3. Step 3: Cross multiply
    216,709.12x = 325,094.78 × 66,962.48
  4. Step 4: Simplify right side
    216,709.12x = 21,769,152,703.85
  5. Step 5: Solve for x
    x = 21,769,152,703.85/216,709.12
  6. Step 6: Final answer
    x = 100,453.33

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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.