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Finding the Fourth Proportional to 85,290.92, 127,936.72 and 26,126.36

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Solution

The fourth proportional to 85,290.92, 127,936.72 and 26,126.36 is: 39,189.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,290.92 : 127,936.72 = 26,126.36 : x
  2. Step 2: Convert to fraction form
    85,290.92/127,936.72 = 26,126.36/x
  3. Step 3: Cross multiply
    85,290.92x = 127,936.72 × 26,126.36
  4. Step 4: Simplify right side
    85,290.92x = 3,342,520,803.94
  5. Step 5: Solve for x
    x = 3,342,520,803.94/85,290.92
  6. Step 6: Final answer
    x = 39,189.64

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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.