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Finding the Fourth Proportional to 216,417.04, 324,660.44 and 66,657.28

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Solution

The fourth proportional to 216,417.04, 324,660.44 and 66,657.28 is: 99,996.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,417.04 : 324,660.44 = 66,657.28 : x
  2. Step 2: Convert to fraction form
    216,417.04/324,660.44 = 66,657.28/x
  3. Step 3: Cross multiply
    216,417.04x = 324,660.44 × 66,657.28
  4. Step 4: Simplify right side
    216,417.04x = 21,640,981,854.00
  5. Step 5: Solve for x
    x = 21,640,981,854.00/216,417.04
  6. Step 6: Final answer
    x = 99,996.66

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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.