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Finding the Fourth Proportional to 236,079.13, 325,788.69 and 128,648.90

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Solution

The fourth proportional to 236,079.13, 325,788.69 and 128,648.90 is: 177,535.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,079.13 : 325,788.69 = 128,648.90 : x
  2. Step 2: Convert to fraction form
    236,079.13/325,788.69 = 128,648.90/x
  3. Step 3: Cross multiply
    236,079.13x = 325,788.69 × 128,648.90
  4. Step 4: Simplify right side
    236,079.13x = 41,912,356,600.94
  5. Step 5: Solve for x
    x = 41,912,356,600.94/236,079.13
  6. Step 6: Final answer
    x = 177,535.21

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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.