Home / 78,589.28-108,460.32-48,382.40

Finding the Fourth Proportional to 78,589.28, 108,460.32 and 48,382.40

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Solution

The fourth proportional to 78,589.28, 108,460.32 and 48,382.40 is: 66,772.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,589.28 : 108,460.32 = 48,382.40 : x
  2. Step 2: Convert to fraction form
    78,589.28/108,460.32 = 48,382.40/x
  3. Step 3: Cross multiply
    78,589.28x = 108,460.32 × 48,382.40
  4. Step 4: Simplify right side
    78,589.28x = 5,247,570,586.37
  5. Step 5: Solve for x
    x = 5,247,570,586.37/78,589.28
  6. Step 6: Final answer
    x = 66,772.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.