Home / 158,631.96-218,912.40-87,012.56

Finding the Fourth Proportional to 158,631.96, 218,912.40 and 87,012.56

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Solution

The fourth proportional to 158,631.96, 218,912.40 and 87,012.56 is: 120,077.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,631.96 : 218,912.40 = 87,012.56 : x
  2. Step 2: Convert to fraction form
    158,631.96/218,912.40 = 87,012.56/x
  3. Step 3: Cross multiply
    158,631.96x = 218,912.40 × 87,012.56
  4. Step 4: Simplify right side
    158,631.96x = 19,048,128,339.74
  5. Step 5: Solve for x
    x = 19,048,128,339.74/158,631.96
  6. Step 6: Final answer
    x = 120,077.49

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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.