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Finding the Fourth Proportional to 223,673.78, 308,784.18 and 172,571.69

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Solution

The fourth proportional to 223,673.78, 308,784.18 and 172,571.69 is: 238,237.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,673.78 : 308,784.18 = 172,571.69 : x
  2. Step 2: Convert to fraction form
    223,673.78/308,784.18 = 172,571.69/x
  3. Step 3: Cross multiply
    223,673.78x = 308,784.18 × 172,571.69
  4. Step 4: Simplify right side
    223,673.78x = 53,287,407,787.86
  5. Step 5: Solve for x
    x = 53,287,407,787.86/223,673.78
  6. Step 6: Final answer
    x = 238,237.17

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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.