Home / 78,424.20-117,636.30-45,246.60

Finding the Fourth Proportional to 78,424.20, 117,636.30 and 45,246.60

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Solution

The fourth proportional to 78,424.20, 117,636.30 and 45,246.60 is: 67,869.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,424.20 : 117,636.30 = 45,246.60 : x
  2. Step 2: Convert to fraction form
    78,424.20/117,636.30 = 45,246.60/x
  3. Step 3: Cross multiply
    78,424.20x = 117,636.30 × 45,246.60
  4. Step 4: Simplify right side
    78,424.20x = 5,322,642,611.58
  5. Step 5: Solve for x
    x = 5,322,642,611.58/78,424.20
  6. Step 6: Final answer
    x = 67,869.90

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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.