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Finding the Fourth Proportional to 128,380.14, 177,213.22 and 114,927.26

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Solution

The fourth proportional to 128,380.14, 177,213.22 and 114,927.26 is: 158,643.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,380.14 : 177,213.22 = 114,927.26 : x
  2. Step 2: Convert to fraction form
    128,380.14/177,213.22 = 114,927.26/x
  3. Step 3: Cross multiply
    128,380.14x = 177,213.22 × 114,927.26
  4. Step 4: Simplify right side
    128,380.14x = 20,366,628,636.99
  5. Step 5: Solve for x
    x = 20,366,628,636.99/128,380.14
  6. Step 6: Final answer
    x = 158,643.14

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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.