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Finding the Fourth Proportional to 45,708.51, 68,570.42 and 15,721.54

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Solution

The fourth proportional to 45,708.51, 68,570.42 and 15,721.54 is: 23,584.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,708.51 : 68,570.42 = 15,721.54 : x
  2. Step 2: Convert to fraction form
    45,708.51/68,570.42 = 15,721.54/x
  3. Step 3: Cross multiply
    45,708.51x = 68,570.42 × 15,721.54
  4. Step 4: Simplify right side
    45,708.51x = 1,078,032,468.72
  5. Step 5: Solve for x
    x = 1,078,032,468.72/45,708.51
  6. Step 6: Final answer
    x = 23,584.94

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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.