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Finding the Fourth Proportional to 85,126.80, 127,768.90 and 43,036.50

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Solution

The fourth proportional to 85,126.80, 127,768.90 and 43,036.50 is: 64,594.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,126.80 : 127,768.90 = 43,036.50 : x
  2. Step 2: Convert to fraction form
    85,126.80/127,768.90 = 43,036.50/x
  3. Step 3: Cross multiply
    85,126.80x = 127,768.90 × 43,036.50
  4. Step 4: Simplify right side
    85,126.80x = 5,498,726,264.85
  5. Step 5: Solve for x
    x = 5,498,726,264.85/85,126.80
  6. Step 6: Final answer
    x = 64,594.54

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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.