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Finding the Fourth Proportional to 223,721.54, 308,736.75 and 128,233.82

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Solution

The fourth proportional to 223,721.54, 308,736.75 and 128,233.82 is: 176,963.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,721.54 : 308,736.75 = 128,233.82 : x
  2. Step 2: Convert to fraction form
    223,721.54/308,736.75 = 128,233.82/x
  3. Step 3: Cross multiply
    223,721.54x = 308,736.75 × 128,233.82
  4. Step 4: Simplify right side
    223,721.54x = 39,590,492,826.89
  5. Step 5: Solve for x
    x = 39,590,492,826.89/223,721.54
  6. Step 6: Final answer
    x = 176,963.26

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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.