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Finding the Fourth Proportional to 70,292.88, 105,454.91 and 20,375.01

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Solution

The fourth proportional to 70,292.88, 105,454.91 and 20,375.01 is: 30,567.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,292.88 : 105,454.91 = 20,375.01 : x
  2. Step 2: Convert to fraction form
    70,292.88/105,454.91 = 20,375.01/x
  3. Step 3: Cross multiply
    70,292.88x = 105,454.91 × 20,375.01
  4. Step 4: Simplify right side
    70,292.88x = 2,148,644,896.74
  5. Step 5: Solve for x
    x = 2,148,644,896.74/70,292.88
  6. Step 6: Final answer
    x = 30,567.03

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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.