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Finding the Fourth Proportional to 85,136.45, 127,712.00 and 21,956

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Solution

The fourth proportional to 85,136.45, 127,712.00 and 21,956 is: 32,935.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,136.45 : 127,712.00 = 21,956 : x
  2. Step 2: Convert to fraction form
    85,136.45/127,712.00 = 21,956/x
  3. Step 3: Cross multiply
    85,136.45x = 127,712.00 × 21,956
  4. Step 4: Simplify right side
    85,136.45x = 2,804,044,562.22
  5. Step 5: Solve for x
    x = 2,804,044,562.22/85,136.45
  6. Step 6: Final answer
    x = 32,935.89

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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.