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Finding the Fourth Proportional to 70,531.21, 105,796.35 and 17,940.24

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Solution

The fourth proportional to 70,531.21, 105,796.35 and 17,940.24 is: 26,910.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,531.21 : 105,796.35 = 17,940.24 : x
  2. Step 2: Convert to fraction form
    70,531.21/105,796.35 = 17,940.24/x
  3. Step 3: Cross multiply
    70,531.21x = 105,796.35 × 17,940.24
  4. Step 4: Simplify right side
    70,531.21x = 1,898,011,910.12
  5. Step 5: Solve for x
    x = 1,898,011,910.12/70,531.21
  6. Step 6: Final answer
    x = 26,910.24

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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.