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Finding the Fourth Proportional to 158,676.60, 218,975.94 and 87,055.32

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Solution

The fourth proportional to 158,676.60, 218,975.94 and 87,055.32 is: 120,137.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,676.60 : 218,975.94 = 87,055.32 : x
  2. Step 2: Convert to fraction form
    158,676.60/218,975.94 = 87,055.32/x
  3. Step 3: Cross multiply
    158,676.60x = 218,975.94 × 87,055.32
  4. Step 4: Simplify right side
    158,676.60x = 19,063,020,529.00
  5. Step 5: Solve for x
    x = 19,063,020,529.00/158,676.60
  6. Step 6: Final answer
    x = 120,137.57

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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.