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Finding the Fourth Proportional to 78,246.67, 117,340.53 and 28,314.42

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Solution

The fourth proportional to 78,246.67, 117,340.53 and 28,314.42 is: 42,460.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,246.67 : 117,340.53 = 28,314.42 : x
  2. Step 2: Convert to fraction form
    78,246.67/117,340.53 = 28,314.42/x
  3. Step 3: Cross multiply
    78,246.67x = 117,340.53 × 28,314.42
  4. Step 4: Simplify right side
    78,246.67x = 3,322,429,049.44
  5. Step 5: Solve for x
    x = 3,322,429,049.44/78,246.67
  6. Step 6: Final answer
    x = 42,460.96

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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.