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Finding the Fourth Proportional to 82,001.20, 122,783.10 and 82,001.20

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Solution

The fourth proportional to 82,001.20, 122,783.10 and 82,001.20 is: 122,783.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,001.20 : 122,783.10 = 82,001.20 : x
  2. Step 2: Convert to fraction form
    82,001.20/122,783.10 = 82,001.20/x
  3. Step 3: Cross multiply
    82,001.20x = 122,783.10 × 82,001.20
  4. Step 4: Simplify right side
    82,001.20x = 10,068,361,539.72
  5. Step 5: Solve for x
    x = 10,068,361,539.72/82,001.20
  6. Step 6: Final answer
    x = 122,783.10

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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.