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Finding the Fourth Proportional to 171,881.67, 257,829.48 and 81,878.12

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Solution

The fourth proportional to 171,881.67, 257,829.48 and 81,878.12 is: 122,820.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,881.67 : 257,829.48 = 81,878.12 : x
  2. Step 2: Convert to fraction form
    171,881.67/257,829.48 = 81,878.12/x
  3. Step 3: Cross multiply
    171,881.67x = 257,829.48 × 81,878.12
  4. Step 4: Simplify right side
    171,881.67x = 21,110,591,813.83
  5. Step 5: Solve for x
    x = 21,110,591,813.83/171,881.67
  6. Step 6: Final answer
    x = 122,820.50

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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.