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Finding the Fourth Proportional to 169,433.64, 254,142.78 and 74,638.47

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Solution

The fourth proportional to 169,433.64, 254,142.78 and 74,638.47 is: 111,954.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,433.64 : 254,142.78 = 74,638.47 : x
  2. Step 2: Convert to fraction form
    169,433.64/254,142.78 = 74,638.47/x
  3. Step 3: Cross multiply
    169,433.64x = 254,142.78 × 74,638.47
  4. Step 4: Simplify right side
    169,433.64x = 18,968,828,260.75
  5. Step 5: Solve for x
    x = 18,968,828,260.75/169,433.64
  6. Step 6: Final answer
    x = 111,954.32

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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.