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Finding the Fourth Proportional to 81,749.94, 122,671.98 and 34,360.98

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Solution

The fourth proportional to 81,749.94, 122,671.98 and 34,360.98 is: 51,561.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,749.94 : 122,671.98 = 34,360.98 : x
  2. Step 2: Convert to fraction form
    81,749.94/122,671.98 = 34,360.98/x
  3. Step 3: Cross multiply
    81,749.94x = 122,671.98 × 34,360.98
  4. Step 4: Simplify right side
    81,749.94x = 4,215,129,451.34
  5. Step 5: Solve for x
    x = 4,215,129,451.34/81,749.94
  6. Step 6: Final answer
    x = 51,561.25

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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.