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Finding the Fourth Proportional to 81,873.78, 122,344.53 and 61,477.56

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Solution

The fourth proportional to 81,873.78, 122,344.53 and 61,477.56 is: 91,866.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,873.78 : 122,344.53 = 61,477.56 : x
  2. Step 2: Convert to fraction form
    81,873.78/122,344.53 = 61,477.56/x
  3. Step 3: Cross multiply
    81,873.78x = 122,344.53 × 61,477.56
  4. Step 4: Simplify right side
    81,873.78x = 7,521,443,183.75
  5. Step 5: Solve for x
    x = 7,521,443,183.75/81,873.78
  6. Step 6: Final answer
    x = 91,866.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.