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Finding the Fourth Proportional to 216,291.76, 324,412.08 and 66,531.76

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Solution

The fourth proportional to 216,291.76, 324,412.08 and 66,531.76 is: 99,789.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,291.76 : 324,412.08 = 66,531.76 : x
  2. Step 2: Convert to fraction form
    216,291.76/324,412.08 = 66,531.76/x
  3. Step 3: Cross multiply
    216,291.76x = 324,412.08 × 66,531.76
  4. Step 4: Simplify right side
    216,291.76x = 21,583,706,647.66
  5. Step 5: Solve for x
    x = 21,583,706,647.66/216,291.76
  6. Step 6: Final answer
    x = 99,789.78

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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.