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Finding the Fourth Proportional to 81,604.20, 122,406.30 and 75,699.30

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Solution

The fourth proportional to 81,604.20, 122,406.30 and 75,699.30 is: 113,548.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,604.20 : 122,406.30 = 75,699.30 : x
  2. Step 2: Convert to fraction form
    81,604.20/122,406.30 = 75,699.30/x
  3. Step 3: Cross multiply
    81,604.20x = 122,406.30 × 75,699.30
  4. Step 4: Simplify right side
    81,604.20x = 9,266,071,225.59
  5. Step 5: Solve for x
    x = 9,266,071,225.59/81,604.20
  6. Step 6: Final answer
    x = 113,548.95

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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.