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Finding the Fourth Proportional to 54,325.92, 81,455.94 and 21,017.91

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Solution

The fourth proportional to 54,325.92, 81,455.94 and 21,017.91 is: 31,514.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,325.92 : 81,455.94 = 21,017.91 : x
  2. Step 2: Convert to fraction form
    54,325.92/81,455.94 = 21,017.91/x
  3. Step 3: Cross multiply
    54,325.92x = 81,455.94 × 21,017.91
  4. Step 4: Simplify right side
    54,325.92x = 1,712,033,615.89
  5. Step 5: Solve for x
    x = 1,712,033,615.89/54,325.92
  6. Step 6: Final answer
    x = 31,514.12

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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.