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Finding the Fourth Proportional to 81,363.12, 122,022.12 and 39,270.60

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Solution

The fourth proportional to 81,363.12, 122,022.12 and 39,270.60 is: 58,895.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,363.12 : 122,022.12 = 39,270.60 : x
  2. Step 2: Convert to fraction form
    81,363.12/122,022.12 = 39,270.60/x
  3. Step 3: Cross multiply
    81,363.12x = 122,022.12 × 39,270.60
  4. Step 4: Simplify right side
    81,363.12x = 4,791,881,865.67
  5. Step 5: Solve for x
    x = 4,791,881,865.67/81,363.12
  6. Step 6: Final answer
    x = 58,895.01

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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.