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Finding the Fourth Proportional to 223,672.78, 308,782.80 and 172,570.69

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Solution

The fourth proportional to 223,672.78, 308,782.80 and 172,570.69 is: 238,235.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,672.78 : 308,782.80 = 172,570.69 : x
  2. Step 2: Convert to fraction form
    223,672.78/308,782.80 = 172,570.69/x
  3. Step 3: Cross multiply
    223,672.78x = 308,782.80 × 172,570.69
  4. Step 4: Simplify right side
    223,672.78x = 53,286,860,856.13
  5. Step 5: Solve for x
    x = 53,286,860,856.13/223,672.78
  6. Step 6: Final answer
    x = 238,235.79

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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.