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Finding the Fourth Proportional to 135,179.54, 186,485.76 and 87,448.28

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Solution

The fourth proportional to 135,179.54, 186,485.76 and 87,448.28 is: 120,638.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,179.54 : 186,485.76 = 87,448.28 : x
  2. Step 2: Convert to fraction form
    135,179.54/186,485.76 = 87,448.28/x
  3. Step 3: Cross multiply
    135,179.54x = 186,485.76 × 87,448.28
  4. Step 4: Simplify right side
    135,179.54x = 16,307,858,956.49
  5. Step 5: Solve for x
    x = 16,307,858,956.49/135,179.54
  6. Step 6: Final answer
    x = 120,638.51

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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.