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Finding the Fourth Proportional to 158,599.45, 218,867.27 and 86,980.97

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Solution

The fourth proportional to 158,599.45, 218,867.27 and 86,980.97 is: 120,033.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,599.45 : 218,867.27 = 86,980.97 : x
  2. Step 2: Convert to fraction form
    158,599.45/218,867.27 = 86,980.97/x
  3. Step 3: Cross multiply
    158,599.45x = 218,867.27 × 86,980.97
  4. Step 4: Simplify right side
    158,599.45x = 19,037,287,558.12
  5. Step 5: Solve for x
    x = 19,037,287,558.12/158,599.45
  6. Step 6: Final answer
    x = 120,033.75

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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.