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Finding the Fourth Proportional to 82,124.80, 122,956.80 and 79,820.80

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Solution

The fourth proportional to 82,124.80, 122,956.80 and 79,820.80 is: 119,507.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,124.80 : 122,956.80 = 79,820.80 : x
  2. Step 2: Convert to fraction form
    82,124.80/122,956.80 = 79,820.80/x
  3. Step 3: Cross multiply
    82,124.80x = 122,956.80 × 79,820.80
  4. Step 4: Simplify right side
    82,124.80x = 9,814,510,141.44
  5. Step 5: Solve for x
    x = 9,814,510,141.44/82,124.80
  6. Step 6: Final answer
    x = 119,507.26

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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.