Home / 158,420.64-218,620.44-86,803.38

Finding the Fourth Proportional to 158,420.64, 218,620.44 and 86,803.38

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Solution

The fourth proportional to 158,420.64, 218,620.44 and 86,803.38 is: 119,788.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,420.64 : 218,620.44 = 86,803.38 : x
  2. Step 2: Convert to fraction form
    158,420.64/218,620.44 = 86,803.38/x
  3. Step 3: Cross multiply
    158,420.64x = 218,620.44 × 86,803.38
  4. Step 4: Simplify right side
    158,420.64x = 18,976,993,129.09
  5. Step 5: Solve for x
    x = 18,976,993,129.09/158,420.64
  6. Step 6: Final answer
    x = 119,788.64

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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.