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Finding the Fourth Proportional to 81,611.19, 122,392.08 and 29,017.89

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Solution

The fourth proportional to 81,611.19, 122,392.08 and 29,017.89 is: 43,518.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,611.19 : 122,392.08 = 29,017.89 : x
  2. Step 2: Convert to fraction form
    81,611.19/122,392.08 = 29,017.89/x
  3. Step 3: Cross multiply
    81,611.19x = 122,392.08 × 29,017.89
  4. Step 4: Simplify right side
    81,611.19x = 3,551,559,914.31
  5. Step 5: Solve for x
    x = 3,551,559,914.31/81,611.19
  6. Step 6: Final answer
    x = 43,518.05

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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.