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Finding the Fourth Proportional to 70,380.86, 105,571.99 and 17,790.36

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Solution

The fourth proportional to 70,380.86, 105,571.99 and 17,790.36 is: 26,685.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,380.86 : 105,571.99 = 17,790.36 : x
  2. Step 2: Convert to fraction form
    70,380.86/105,571.99 = 17,790.36/x
  3. Step 3: Cross multiply
    70,380.86x = 105,571.99 × 17,790.36
  4. Step 4: Simplify right side
    70,380.86x = 1,878,163,708.02
  5. Step 5: Solve for x
    x = 1,878,163,708.02/70,380.86
  6. Step 6: Final answer
    x = 26,685.72

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1.5x scale

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.