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Finding the Fourth Proportional to 81,725.50, 122,588.25 and 26,321.50

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Solution

The fourth proportional to 81,725.50, 122,588.25 and 26,321.50 is: 39,482.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,725.50 : 122,588.25 = 26,321.50 : x
  2. Step 2: Convert to fraction form
    81,725.50/122,588.25 = 26,321.50/x
  3. Step 3: Cross multiply
    81,725.50x = 122,588.25 × 26,321.50
  4. Step 4: Simplify right side
    81,725.50x = 3,226,706,622.38
  5. Step 5: Solve for x
    x = 3,226,706,622.38/81,725.50
  6. Step 6: Final answer
    x = 39,482.25

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Double scale
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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.