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Finding the Fourth Proportional to 71,628.95, 107,443.30 and 19,038.43

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Solution

The fourth proportional to 71,628.95, 107,443.30 and 19,038.43 is: 28,557.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,628.95 : 107,443.30 = 19,038.43 : x
  2. Step 2: Convert to fraction form
    71,628.95/107,443.30 = 19,038.43/x
  3. Step 3: Cross multiply
    71,628.95x = 107,443.30 × 19,038.43
  4. Step 4: Simplify right side
    71,628.95x = 2,045,551,690.56
  5. Step 5: Solve for x
    x = 2,045,551,690.56/71,628.95
  6. Step 6: Final answer
    x = 28,557.61

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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.