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Finding the Fourth Proportional to 216,636.50, 324,924.68 and 66,881.72

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Solution

The fourth proportional to 216,636.50, 324,924.68 and 66,881.72 is: 100,313.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,636.50 : 324,924.68 = 66,881.72 : x
  2. Step 2: Convert to fraction form
    216,636.50/324,924.68 = 66,881.72/x
  3. Step 3: Cross multiply
    216,636.50x = 324,924.68 × 66,881.72
  4. Step 4: Simplify right side
    216,636.50x = 21,731,519,509.82
  5. Step 5: Solve for x
    x = 21,731,519,509.82/216,636.50
  6. Step 6: Final answer
    x = 100,313.29

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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.