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Finding the Fourth Proportional to 85,918.50, 128,888.28 and 26,744.76

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Solution

The fourth proportional to 85,918.50, 128,888.28 and 26,744.76 is: 40,120.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,918.50 : 128,888.28 = 26,744.76 : x
  2. Step 2: Convert to fraction form
    85,918.50/128,888.28 = 26,744.76/x
  3. Step 3: Cross multiply
    85,918.50x = 128,888.28 × 26,744.76
  4. Step 4: Simplify right side
    85,918.50x = 3,447,086,115.41
  5. Step 5: Solve for x
    x = 3,447,086,115.41/85,918.50
  6. Step 6: Final answer
    x = 40,120.42

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.