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Finding the Fourth Proportional to 70,302.58, 105,489.22 and 28,212.74

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Solution

The fourth proportional to 70,302.58, 105,489.22 and 28,212.74 is: 42,333.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,302.58 : 105,489.22 = 28,212.74 : x
  2. Step 2: Convert to fraction form
    70,302.58/105,489.22 = 28,212.74/x
  3. Step 3: Cross multiply
    70,302.58x = 105,489.22 × 28,212.74
  4. Step 4: Simplify right side
    70,302.58x = 2,976,139,936.66
  5. Step 5: Solve for x
    x = 2,976,139,936.66/70,302.58
  6. Step 6: Final answer
    x = 42,333.30

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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.