Home / 78,178.83-117,268.33-19,014.09

Finding the Fourth Proportional to 78,178.83, 117,268.33 and 19,014.09

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Solution

The fourth proportional to 78,178.83, 117,268.33 and 19,014.09 is: 28,521.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,178.83 : 117,268.33 = 19,014.09 : x
  2. Step 2: Convert to fraction form
    78,178.83/117,268.33 = 19,014.09/x
  3. Step 3: Cross multiply
    78,178.83x = 117,268.33 × 19,014.09
  4. Step 4: Simplify right side
    78,178.83x = 2,229,750,580.77
  5. Step 5: Solve for x
    x = 2,229,750,580.77/78,178.83
  6. Step 6: Final answer
    x = 28,521.16

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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.