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Finding the Fourth Proportional to 223,671.78, 308,781.42 and 172,569.69

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Solution

The fourth proportional to 223,671.78, 308,781.42 and 172,569.69 is: 238,234.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,671.78 : 308,781.42 = 172,569.69 : x
  2. Step 2: Convert to fraction form
    223,671.78/308,781.42 = 172,569.69/x
  3. Step 3: Cross multiply
    223,671.78x = 308,781.42 × 172,569.69
  4. Step 4: Simplify right side
    223,671.78x = 53,286,313,280.02
  5. Step 5: Solve for x
    x = 53,286,313,280.02/223,671.78
  6. Step 6: Final answer
    x = 238,234.40

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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.