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Finding the Fourth Proportional to 216,289.42, 324,434.90 and 66,528.70

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Solution

The fourth proportional to 216,289.42, 324,434.90 and 66,528.70 is: 99,793.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,289.42 : 324,434.90 = 66,528.70 : x
  2. Step 2: Convert to fraction form
    216,289.42/324,434.90 = 66,528.70/x
  3. Step 3: Cross multiply
    216,289.42x = 324,434.90 × 66,528.70
  4. Step 4: Simplify right side
    216,289.42x = 21,584,232,131.63
  5. Step 5: Solve for x
    x = 21,584,232,131.63/216,289.42
  6. Step 6: Final answer
    x = 99,793.29

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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.