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Finding the Fourth Proportional to 45,718.96, 68,521.90 and 26,980

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Solution

The fourth proportional to 45,718.96, 68,521.90 and 26,980 is: 40,436.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,718.96 : 68,521.90 = 26,980 : x
  2. Step 2: Convert to fraction form
    45,718.96/68,521.90 = 26,980/x
  3. Step 3: Cross multiply
    45,718.96x = 68,521.90 × 26,980
  4. Step 4: Simplify right side
    45,718.96x = 1,848,720,862.00
  5. Step 5: Solve for x
    x = 1,848,720,862.00/45,718.96
  6. Step 6: Final answer
    x = 40,436.63

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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.