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Finding the Fourth Proportional to 81,624.40, 122,407.80 and 29,035.60

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Solution

The fourth proportional to 81,624.40, 122,407.80 and 29,035.60 is: 43,543.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,624.40 : 122,407.80 = 29,035.60 : x
  2. Step 2: Convert to fraction form
    81,624.40/122,407.80 = 29,035.60/x
  3. Step 3: Cross multiply
    81,624.40x = 122,407.80 × 29,035.60
  4. Step 4: Simplify right side
    81,624.40x = 3,554,183,917.68
  5. Step 5: Solve for x
    x = 3,554,183,917.68/81,624.40
  6. Step 6: Final answer
    x = 43,543.16

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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.