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Finding the Fourth Proportional to 128,304.60, 192,092.40 and 121,322.40

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Solution

The fourth proportional to 128,304.60, 192,092.40 and 121,322.40 is: 181,638.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304.60 : 192,092.40 = 121,322.40 : x
  2. Step 2: Convert to fraction form
    128,304.60/192,092.40 = 121,322.40/x
  3. Step 3: Cross multiply
    128,304.60x = 192,092.40 × 121,322.40
  4. Step 4: Simplify right side
    128,304.60x = 23,305,110,989.76
  5. Step 5: Solve for x
    x = 23,305,110,989.76/128,304.60
  6. Step 6: Final answer
    x = 181,638.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.