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Finding the Fourth Proportional to 216,636.57, 324,985.64 and 66,889.17

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Solution

The fourth proportional to 216,636.57, 324,985.64 and 66,889.17 is: 100,343.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,636.57 : 324,985.64 = 66,889.17 : x
  2. Step 2: Convert to fraction form
    216,636.57/324,985.64 = 66,889.17/x
  3. Step 3: Cross multiply
    216,636.57x = 324,985.64 × 66,889.17
  4. Step 4: Simplify right side
    216,636.57x = 21,738,019,387.07
  5. Step 5: Solve for x
    x = 21,738,019,387.07/216,636.57
  6. Step 6: Final answer
    x = 100,343.26

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1.5x scale

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.