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Finding the Fourth Proportional to 158,612, 218,884.56 and 87,956

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Solution

The fourth proportional to 158,612, 218,884.56 and 87,956 is: 121,379.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,612 : 218,884.56 = 87,956 : x
  2. Step 2: Convert to fraction form
    158,612/218,884.56 = 87,956/x
  3. Step 3: Cross multiply
    158,612x = 218,884.56 × 87,956
  4. Step 4: Simplify right side
    158,612x = 19,252,210,359.36
  5. Step 5: Solve for x
    x = 19,252,210,359.36/158,612
  6. Step 6: Final answer
    x = 121,379.28

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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.