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Finding the Fourth Proportional to 104,640.81, 144,459.42 and 83,998.23

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Solution

The fourth proportional to 104,640.81, 144,459.42 and 83,998.23 is: 115,961.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,640.81 : 144,459.42 = 83,998.23 : x
  2. Step 2: Convert to fraction form
    104,640.81/144,459.42 = 83,998.23/x
  3. Step 3: Cross multiply
    104,640.81x = 144,459.42 × 83,998.23
  4. Step 4: Simplify right side
    104,640.81x = 12,134,335,586.83
  5. Step 5: Solve for x
    x = 12,134,335,586.83/104,640.81
  6. Step 6: Final answer
    x = 115,961.79

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.