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Finding the Fourth Proportional to 70,238.08, 105,357.22 and 28,685.08

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Solution

The fourth proportional to 70,238.08, 105,357.22 and 28,685.08 is: 43,027.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,238.08 : 105,357.22 = 28,685.08 : x
  2. Step 2: Convert to fraction form
    70,238.08/105,357.22 = 28,685.08/x
  3. Step 3: Cross multiply
    70,238.08x = 105,357.22 × 28,685.08
  4. Step 4: Simplify right side
    70,238.08x = 3,022,180,284.28
  5. Step 5: Solve for x
    x = 3,022,180,284.28/70,238.08
  6. Step 6: Final answer
    x = 43,027.66

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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.