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Finding the Fourth Proportional to 223,718.90, 308,733.39 and 121,745.16

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Solution

The fourth proportional to 223,718.90, 308,733.39 and 121,745.16 is: 168,009.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,718.90 : 308,733.39 = 121,745.16 : x
  2. Step 2: Convert to fraction form
    223,718.90/308,733.39 = 121,745.16/x
  3. Step 3: Cross multiply
    223,718.90x = 308,733.39 × 121,745.16
  4. Step 4: Simplify right side
    223,718.90x = 37,586,795,962.89
  5. Step 5: Solve for x
    x = 37,586,795,962.89/223,718.90
  6. Step 6: Final answer
    x = 168,009.04

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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.