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Finding the Fourth Proportional to 121,021.52, 166,963.08 and 89,265.68

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Solution

The fourth proportional to 121,021.52, 166,963.08 and 89,265.68 is: 123,152.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,021.52 : 166,963.08 = 89,265.68 : x
  2. Step 2: Convert to fraction form
    121,021.52/166,963.08 = 89,265.68/x
  3. Step 3: Cross multiply
    121,021.52x = 166,963.08 × 89,265.68
  4. Step 4: Simplify right side
    121,021.52x = 14,904,072,871.09
  5. Step 5: Solve for x
    x = 14,904,072,871.09/121,021.52
  6. Step 6: Final answer
    x = 123,152.25

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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.