Home / 85,940.21-128,913.81-40,938.43

Finding the Fourth Proportional to 85,940.21, 128,913.81 and 40,938.43

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Solution

The fourth proportional to 85,940.21, 128,913.81 and 40,938.43 is: 61,409.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,940.21 : 128,913.81 = 40,938.43 : x
  2. Step 2: Convert to fraction form
    85,940.21/128,913.81 = 40,938.43/x
  3. Step 3: Cross multiply
    85,940.21x = 128,913.81 × 40,938.43
  4. Step 4: Simplify right side
    85,940.21x = 5,277,528,782.03
  5. Step 5: Solve for x
    x = 5,277,528,782.03/85,940.21
  6. Step 6: Final answer
    x = 61,409.31

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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.