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Finding the Fourth Proportional to 223,694.94, 308,702.71 and 121,720.93

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Solution

The fourth proportional to 223,694.94, 308,702.71 and 121,720.93 is: 167,976.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,694.94 : 308,702.71 = 121,720.93 : x
  2. Step 2: Convert to fraction form
    223,694.94/308,702.71 = 121,720.93/x
  3. Step 3: Cross multiply
    223,694.94x = 308,702.71 × 121,720.93
  4. Step 4: Simplify right side
    223,694.94x = 37,575,580,335.11
  5. Step 5: Solve for x
    x = 37,575,580,335.11/223,694.94
  6. Step 6: Final answer
    x = 167,976.89

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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.