Home / 78,246.55-117,340.35-28,314.30

Finding the Fourth Proportional to 78,246.55, 117,340.35 and 28,314.30

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Solution

The fourth proportional to 78,246.55, 117,340.35 and 28,314.30 is: 42,460.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,246.55 : 117,340.35 = 28,314.30 : x
  2. Step 2: Convert to fraction form
    78,246.55/117,340.35 = 28,314.30/x
  3. Step 3: Cross multiply
    78,246.55x = 117,340.35 × 28,314.30
  4. Step 4: Simplify right side
    78,246.55x = 3,322,409,872.01
  5. Step 5: Solve for x
    x = 3,322,409,872.01/78,246.55
  6. Step 6: Final answer
    x = 42,460.78

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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.