Home / 74,120.73-102,285.87-40,128.32

Finding the Fourth Proportional to 74,120.73, 102,285.87 and 40,128.32

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Solution

The fourth proportional to 74,120.73, 102,285.87 and 40,128.32 is: 55,376.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,120.73 : 102,285.87 = 40,128.32 : x
  2. Step 2: Convert to fraction form
    74,120.73/102,285.87 = 40,128.32/x
  3. Step 3: Cross multiply
    74,120.73x = 102,285.87 × 40,128.32
  4. Step 4: Simplify right side
    74,120.73x = 4,104,560,122.84
  5. Step 5: Solve for x
    x = 4,104,560,122.84/74,120.73
  6. Step 6: Final answer
    x = 55,376.68

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1.5x scale

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.