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Finding the Fourth Proportional to 157,912.95, 217,942.10 and 100,533.95

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Solution

The fourth proportional to 157,912.95, 217,942.10 and 100,533.95 is: 138,751.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,912.95 : 217,942.10 = 100,533.95 : x
  2. Step 2: Convert to fraction form
    157,912.95/217,942.10 = 100,533.95/x
  3. Step 3: Cross multiply
    157,912.95x = 217,942.10 × 100,533.95
  4. Step 4: Simplify right side
    157,912.95x = 21,910,579,786.20
  5. Step 5: Solve for x
    x = 21,910,579,786.20/157,912.95
  6. Step 6: Final answer
    x = 138,751.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.