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Finding the Fourth Proportional to 45,407.99, 68,058.43 and 20,418.68

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Solution

The fourth proportional to 45,407.99, 68,058.43 and 20,418.68 is: 30,603.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,407.99 : 68,058.43 = 20,418.68 : x
  2. Step 2: Convert to fraction form
    45,407.99/68,058.43 = 20,418.68/x
  3. Step 3: Cross multiply
    45,407.99x = 68,058.43 × 20,418.68
  4. Step 4: Simplify right side
    45,407.99x = 1,389,663,422.57
  5. Step 5: Solve for x
    x = 1,389,663,422.57/45,407.99
  6. Step 6: Final answer
    x = 30,603.94

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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.