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Finding the Fourth Proportional to 223,886.18, 308,726.15 and 172,907.21

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Solution

The fourth proportional to 223,886.18, 308,726.15 and 172,907.21 is: 238,429.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,886.18 : 308,726.15 = 172,907.21 : x
  2. Step 2: Convert to fraction form
    223,886.18/308,726.15 = 172,907.21/x
  3. Step 3: Cross multiply
    223,886.18x = 308,726.15 × 172,907.21
  4. Step 4: Simplify right side
    223,886.18x = 53,380,974,842.37
  5. Step 5: Solve for x
    x = 53,380,974,842.37/223,886.18
  6. Step 6: Final answer
    x = 238,429.08

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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.