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Finding the Fourth Proportional to 104,730.56, 144,481.20 and 70,728

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Solution

The fourth proportional to 104,730.56, 144,481.20 and 70,728 is: 97,572.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,730.56 : 144,481.20 = 70,728 : x
  2. Step 2: Convert to fraction form
    104,730.56/144,481.20 = 70,728/x
  3. Step 3: Cross multiply
    104,730.56x = 144,481.20 × 70,728
  4. Step 4: Simplify right side
    104,730.56x = 10,218,866,313.60
  5. Step 5: Solve for x
    x = 10,218,866,313.60/104,730.56
  6. Step 6: Final answer
    x = 97,572.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.