Home / 258,670.32-388,071.06-81,178.84

Finding the Fourth Proportional to 258,670.32, 388,071.06 and 81,178.84

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Solution

The fourth proportional to 258,670.32, 388,071.06 and 81,178.84 is: 121,788.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,670.32 : 388,071.06 = 81,178.84 : x
  2. Step 2: Convert to fraction form
    258,670.32/388,071.06 = 81,178.84/x
  3. Step 3: Cross multiply
    258,670.32x = 388,071.06 × 81,178.84
  4. Step 4: Simplify right side
    258,670.32x = 31,503,158,488.37
  5. Step 5: Solve for x
    x = 31,503,158,488.37/258,670.32
  6. Step 6: Final answer
    x = 121,788.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.