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Finding the Fourth Proportional to 81,804.80, 122,415.60 and 56,727.20

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Solution

The fourth proportional to 81,804.80, 122,415.60 and 56,727.20 is: 84,888.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,804.80 : 122,415.60 = 56,727.20 : x
  2. Step 2: Convert to fraction form
    81,804.80/122,415.60 = 56,727.20/x
  3. Step 3: Cross multiply
    81,804.80x = 122,415.60 × 56,727.20
  4. Step 4: Simplify right side
    81,804.80x = 6,944,294,224.32
  5. Step 5: Solve for x
    x = 6,944,294,224.32/81,804.80
  6. Step 6: Final answer
    x = 84,888.59

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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.