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Finding the Fourth Proportional to 56,138.84, 84,137.74 and 28,066.71

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Solution

The fourth proportional to 56,138.84, 84,137.74 and 28,066.71 is: 42,064.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,138.84 : 84,137.74 = 28,066.71 : x
  2. Step 2: Convert to fraction form
    56,138.84/84,137.74 = 28,066.71/x
  3. Step 3: Cross multiply
    56,138.84x = 84,137.74 × 28,066.71
  4. Step 4: Simplify right side
    56,138.84x = 2,361,469,548.64
  5. Step 5: Solve for x
    x = 2,361,469,548.64/56,138.84
  6. Step 6: Final answer
    x = 42,064.81

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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.