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Finding the Fourth Proportional to 86,912.88, 130,389.66 and 26,938.22

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Solution

The fourth proportional to 86,912.88, 130,389.66 and 26,938.22 is: 40,413.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,912.88 : 130,389.66 = 26,938.22 : x
  2. Step 2: Convert to fraction form
    86,912.88/130,389.66 = 26,938.22/x
  3. Step 3: Cross multiply
    86,912.88x = 130,389.66 × 26,938.22
  4. Step 4: Simplify right side
    86,912.88x = 3,512,465,466.18
  5. Step 5: Solve for x
    x = 3,512,465,466.18/86,912.88
  6. Step 6: Final answer
    x = 40,413.64

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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.