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Finding the Fourth Proportional to 121,877.55, 168,233.31 and 83,763.27

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Solution

The fourth proportional to 121,877.55, 168,233.31 and 83,763.27 is: 115,622.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,877.55 : 168,233.31 = 83,763.27 : x
  2. Step 2: Convert to fraction form
    121,877.55/168,233.31 = 83,763.27/x
  3. Step 3: Cross multiply
    121,877.55x = 168,233.31 × 83,763.27
  4. Step 4: Simplify right side
    121,877.55x = 14,091,772,168.52
  5. Step 5: Solve for x
    x = 14,091,772,168.52/121,877.55
  6. Step 6: Final answer
    x = 115,622.38

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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.