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Finding the Fourth Proportional to 70,421.94, 105,561.72 and 44,145.09

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Solution

The fourth proportional to 70,421.94, 105,561.72 and 44,145.09 is: 66,173.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,421.94 : 105,561.72 = 44,145.09 : x
  2. Step 2: Convert to fraction form
    70,421.94/105,561.72 = 44,145.09/x
  3. Step 3: Cross multiply
    70,421.94x = 105,561.72 × 44,145.09
  4. Step 4: Simplify right side
    70,421.94x = 4,660,031,629.95
  5. Step 5: Solve for x
    x = 4,660,031,629.95/70,421.94
  6. Step 6: Final answer
    x = 66,173.01

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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.