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Finding the Fourth Proportional to 82,099.52, 122,555.53 and 72,135.01

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Solution

The fourth proportional to 82,099.52, 122,555.53 and 72,135.01 is: 107,680.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,099.52 : 122,555.53 = 72,135.01 : x
  2. Step 2: Convert to fraction form
    82,099.52/122,555.53 = 72,135.01/x
  3. Step 3: Cross multiply
    82,099.52x = 122,555.53 × 72,135.01
  4. Step 4: Simplify right side
    82,099.52x = 8,840,543,936.09
  5. Step 5: Solve for x
    x = 8,840,543,936.09/82,099.52
  6. Step 6: Final answer
    x = 107,680.82

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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.