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Finding the Fourth Proportional to 74,981.12, 112,471.68 and 19,576.64

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Solution

The fourth proportional to 74,981.12, 112,471.68 and 19,576.64 is: 29,364.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,981.12 : 112,471.68 = 19,576.64 : x
  2. Step 2: Convert to fraction form
    74,981.12/112,471.68 = 19,576.64/x
  3. Step 3: Cross multiply
    74,981.12x = 112,471.68 × 19,576.64
  4. Step 4: Simplify right side
    74,981.12x = 2,201,817,589.56
  5. Step 5: Solve for x
    x = 2,201,817,589.56/74,981.12
  6. Step 6: Final answer
    x = 29,364.96

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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.