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Finding the Fourth Proportional to 74,632.17, 111,963.03 and 21,324.63

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Solution

The fourth proportional to 74,632.17, 111,963.03 and 21,324.63 is: 31,991.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,632.17 : 111,963.03 = 21,324.63 : x
  2. Step 2: Convert to fraction form
    74,632.17/111,963.03 = 21,324.63/x
  3. Step 3: Cross multiply
    74,632.17x = 111,963.03 × 21,324.63
  4. Step 4: Simplify right side
    74,632.17x = 2,387,570,528.32
  5. Step 5: Solve for x
    x = 2,387,570,528.32/74,632.17
  6. Step 6: Final answer
    x = 31,991.17

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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.