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Finding the Fourth Proportional to 319,804.94, 479,619.84 and 120,109.88

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Solution

The fourth proportional to 319,804.94, 479,619.84 and 120,109.88 is: 180,131.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,804.94 : 479,619.84 = 120,109.88 : x
  2. Step 2: Convert to fraction form
    319,804.94/479,619.84 = 120,109.88/x
  3. Step 3: Cross multiply
    319,804.94x = 479,619.84 × 120,109.88
  4. Step 4: Simplify right side
    319,804.94x = 57,607,081,428.02
  5. Step 5: Solve for x
    x = 57,607,081,428.02/319,804.94
  6. Step 6: Final answer
    x = 180,131.93

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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.