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Finding the Fourth Proportional to 81,749.60, 122,624.40 and 29,218.40

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Solution

The fourth proportional to 81,749.60, 122,624.40 and 29,218.40 is: 43,827.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,749.60 : 122,624.40 = 29,218.40 : x
  2. Step 2: Convert to fraction form
    81,749.60/122,624.40 = 29,218.40/x
  3. Step 3: Cross multiply
    81,749.60x = 122,624.40 × 29,218.40
  4. Step 4: Simplify right side
    81,749.60x = 3,582,888,768.96
  5. Step 5: Solve for x
    x = 3,582,888,768.96/81,749.60
  6. Step 6: Final answer
    x = 43,827.60

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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.