Home / 78,120.30-117,180.27-18,955.92

Finding the Fourth Proportional to 78,120.30, 117,180.27 and 18,955.92

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Solution

The fourth proportional to 78,120.30, 117,180.27 and 18,955.92 is: 28,433.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,120.30 : 117,180.27 = 18,955.92 : x
  2. Step 2: Convert to fraction form
    78,120.30/117,180.27 = 18,955.92/x
  3. Step 3: Cross multiply
    78,120.30x = 117,180.27 × 18,955.92
  4. Step 4: Simplify right side
    78,120.30x = 2,221,259,823.70
  5. Step 5: Solve for x
    x = 2,221,259,823.70/78,120.30
  6. Step 6: Final answer
    x = 28,433.84

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1.5x scale

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.