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Finding the Fourth Proportional to 158,682.51, 218,996.06 and 87,076.49

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Solution

The fourth proportional to 158,682.51, 218,996.06 and 87,076.49 is: 120,173.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,682.51 : 218,996.06 = 87,076.49 : x
  2. Step 2: Convert to fraction form
    158,682.51/218,996.06 = 87,076.49/x
  3. Step 3: Cross multiply
    158,682.51x = 218,996.06 × 87,076.49
  4. Step 4: Simplify right side
    158,682.51x = 19,069,406,698.27
  5. Step 5: Solve for x
    x = 19,069,406,698.27/158,682.51
  6. Step 6: Final answer
    x = 120,173.34

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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.