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Finding the Fourth Proportional to 81,808.47, 122,532.84 and 67,607.55

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Solution

The fourth proportional to 81,808.47, 122,532.84 and 67,607.55 is: 101,262.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,808.47 : 122,532.84 = 67,607.55 : x
  2. Step 2: Convert to fraction form
    81,808.47/122,532.84 = 67,607.55/x
  3. Step 3: Cross multiply
    81,808.47x = 122,532.84 × 67,607.55
  4. Step 4: Simplify right side
    81,808.47x = 8,284,145,106.94
  5. Step 5: Solve for x
    x = 8,284,145,106.94/81,808.47
  6. Step 6: Final answer
    x = 101,262.68

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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.