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Finding the Fourth Proportional to 85,136.95, 127,712.75 and 21,956.50

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Solution

The fourth proportional to 85,136.95, 127,712.75 and 21,956.50 is: 32,936.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,136.95 : 127,712.75 = 21,956.50 : x
  2. Step 2: Convert to fraction form
    85,136.95/127,712.75 = 21,956.50/x
  3. Step 3: Cross multiply
    85,136.95x = 127,712.75 × 21,956.50
  4. Step 4: Simplify right side
    85,136.95x = 2,804,124,995.38
  5. Step 5: Solve for x
    x = 2,804,124,995.38/85,136.95
  6. Step 6: Final answer
    x = 32,936.64

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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.