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Finding the Fourth Proportional to 85,918.68, 128,880.18 and 23,589

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Solution

The fourth proportional to 85,918.68, 128,880.18 and 23,589 is: 35,384.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,918.68 : 128,880.18 = 23,589 : x
  2. Step 2: Convert to fraction form
    85,918.68/128,880.18 = 23,589/x
  3. Step 3: Cross multiply
    85,918.68x = 128,880.18 × 23,589
  4. Step 4: Simplify right side
    85,918.68x = 3,040,154,566.02
  5. Step 5: Solve for x
    x = 3,040,154,566.02/85,918.68
  6. Step 6: Final answer
    x = 35,384.09

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1.5x scale

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.