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Finding the Fourth Proportional to 203,112.54, 304,731.09 and 90,887.22

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Solution

The fourth proportional to 203,112.54, 304,731.09 and 90,887.22 is: 136,358.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,112.54 : 304,731.09 = 90,887.22 : x
  2. Step 2: Convert to fraction form
    203,112.54/304,731.09 = 90,887.22/x
  3. Step 3: Cross multiply
    203,112.54x = 304,731.09 × 90,887.22
  4. Step 4: Simplify right side
    203,112.54x = 27,696,161,617.67
  5. Step 5: Solve for x
    x = 27,696,161,617.67/203,112.54
  6. Step 6: Final answer
    x = 136,358.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.