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Finding the Fourth Proportional to 54,168, 74,760.48 and 31,807.68

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Solution

The fourth proportional to 54,168, 74,760.48 and 31,807.68 is: 43,899.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,168 : 74,760.48 = 31,807.68 : x
  2. Step 2: Convert to fraction form
    54,168/74,760.48 = 31,807.68/x
  3. Step 3: Cross multiply
    54,168x = 74,760.48 × 31,807.68
  4. Step 4: Simplify right side
    54,168x = 2,377,957,424.49
  5. Step 5: Solve for x
    x = 2,377,957,424.49/54,168
  6. Step 6: Final answer
    x = 43,899.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.