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Finding the Fourth Proportional to 70,293.88, 105,456.41 and 20,376.01

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Solution

The fourth proportional to 70,293.88, 105,456.41 and 20,376.01 is: 30,568.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,293.88 : 105,456.41 = 20,376.01 : x
  2. Step 2: Convert to fraction form
    70,293.88/105,456.41 = 20,376.01/x
  3. Step 3: Cross multiply
    70,293.88x = 105,456.41 × 20,376.01
  4. Step 4: Simplify right side
    70,293.88x = 2,148,780,864.72
  5. Step 5: Solve for x
    x = 2,148,780,864.72/70,293.88
  6. Step 6: Final answer
    x = 30,568.53

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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.