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Finding the Fourth Proportional to 102,618.76, 154,161.72 and 74,243.28

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Solution

The fourth proportional to 102,618.76, 154,161.72 and 74,243.28 is: 111,533.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,618.76 : 154,161.72 = 74,243.28 : x
  2. Step 2: Convert to fraction form
    102,618.76/154,161.72 = 74,243.28/x
  3. Step 3: Cross multiply
    102,618.76x = 154,161.72 × 74,243.28
  4. Step 4: Simplify right side
    102,618.76x = 11,445,471,743.24
  5. Step 5: Solve for x
    x = 11,445,471,743.24/102,618.76
  6. Step 6: Final answer
    x = 111,533.91

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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.