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Finding the Fourth Proportional to 81,992.64, 122,989 and 63,300

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Solution

The fourth proportional to 81,992.64, 122,989 and 63,300 is: 94,950.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,992.64 : 122,989 = 63,300 : x
  2. Step 2: Convert to fraction form
    81,992.64/122,989 = 63,300/x
  3. Step 3: Cross multiply
    81,992.64x = 122,989 × 63,300
  4. Step 4: Simplify right side
    81,992.64x = 7,785,203,700
  5. Step 5: Solve for x
    x = 7,785,203,700/81,992.64
  6. Step 6: Final answer
    x = 94,950.03

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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.