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Finding the Fourth Proportional to 128,481.23, 177,288.41 and 74,051.01

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Solution

The fourth proportional to 128,481.23, 177,288.41 and 74,051.01 is: 102,181.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,481.23 : 177,288.41 = 74,051.01 : x
  2. Step 2: Convert to fraction form
    128,481.23/177,288.41 = 74,051.01/x
  3. Step 3: Cross multiply
    128,481.23x = 177,288.41 × 74,051.01
  4. Step 4: Simplify right side
    128,481.23x = 13,128,385,451.54
  5. Step 5: Solve for x
    x = 13,128,385,451.54/128,481.23
  6. Step 6: Final answer
    x = 102,181.35

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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.