Home / 81,976.10-122,964.15-77,699.30

Finding the Fourth Proportional to 81,976.10, 122,964.15 and 77,699.30

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Solution

The fourth proportional to 81,976.10, 122,964.15 and 77,699.30 is: 116,548.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,976.10 : 122,964.15 = 77,699.30 : x
  2. Step 2: Convert to fraction form
    81,976.10/122,964.15 = 77,699.30/x
  3. Step 3: Cross multiply
    81,976.10x = 122,964.15 × 77,699.30
  4. Step 4: Simplify right side
    81,976.10x = 9,554,228,380.10
  5. Step 5: Solve for x
    x = 9,554,228,380.10/81,976.10
  6. Step 6: Final answer
    x = 116,548.95

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1.5x scale

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.