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Finding the Fourth Proportional to 85,083.36, 127,638.88 and 28,928.49

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Solution

The fourth proportional to 85,083.36, 127,638.88 and 28,928.49 is: 43,397.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,083.36 : 127,638.88 = 28,928.49 : x
  2. Step 2: Convert to fraction form
    85,083.36/127,638.88 = 28,928.49/x
  3. Step 3: Cross multiply
    85,083.36x = 127,638.88 × 28,928.49
  4. Step 4: Simplify right side
    85,083.36x = 3,692,399,991.37
  5. Step 5: Solve for x
    x = 3,692,399,991.37/85,083.36
  6. Step 6: Final answer
    x = 43,397.44

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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.