Home / 90,414.40-135,621.60-72,918.40

Finding the Fourth Proportional to 90,414.40, 135,621.60 and 72,918.40

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Solution

The fourth proportional to 90,414.40, 135,621.60 and 72,918.40 is: 109,377.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,414.40 : 135,621.60 = 72,918.40 : x
  2. Step 2: Convert to fraction form
    90,414.40/135,621.60 = 72,918.40/x
  3. Step 3: Cross multiply
    90,414.40x = 135,621.60 × 72,918.40
  4. Step 4: Simplify right side
    90,414.40x = 9,889,310,077.44
  5. Step 5: Solve for x
    x = 9,889,310,077.44/90,414.40
  6. Step 6: Final answer
    x = 109,377.60

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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.