Home / 78,118.92-117,178.35-18,954.06

Finding the Fourth Proportional to 78,118.92, 117,178.35 and 18,954.06

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Solution

The fourth proportional to 78,118.92, 117,178.35 and 18,954.06 is: 28,431.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,118.92 : 117,178.35 = 18,954.06 : x
  2. Step 2: Convert to fraction form
    78,118.92/117,178.35 = 18,954.06/x
  3. Step 3: Cross multiply
    78,118.92x = 117,178.35 × 18,954.06
  4. Step 4: Simplify right side
    78,118.92x = 2,221,005,476.60
  5. Step 5: Solve for x
    x = 2,221,005,476.60/78,118.92
  6. Step 6: Final answer
    x = 28,431.08

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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.