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Finding the Fourth Proportional to 74,672.28, 111,990.74 and 21,362.63

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Solution

The fourth proportional to 74,672.28, 111,990.74 and 21,362.63 is: 32,038.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,672.28 : 111,990.74 = 21,362.63 : x
  2. Step 2: Convert to fraction form
    74,672.28/111,990.74 = 21,362.63/x
  3. Step 3: Cross multiply
    74,672.28x = 111,990.74 × 21,362.63
  4. Step 4: Simplify right side
    74,672.28x = 2,392,416,075.28
  5. Step 5: Solve for x
    x = 2,392,416,075.28/74,672.28
  6. Step 6: Final answer
    x = 32,038.88

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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.