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Finding the Fourth Proportional to 170,757.64, 235,661.76 and 121,671.64

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Solution

The fourth proportional to 170,757.64, 235,661.76 and 121,671.64 is: 167,918.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,757.64 : 235,661.76 = 121,671.64 : x
  2. Step 2: Convert to fraction form
    170,757.64/235,661.76 = 121,671.64/x
  3. Step 3: Cross multiply
    170,757.64x = 235,661.76 × 121,671.64
  4. Step 4: Simplify right side
    170,757.64x = 28,673,352,824.49
  5. Step 5: Solve for x
    x = 28,673,352,824.49/170,757.64
  6. Step 6: Final answer
    x = 167,918.42

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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.