Home / 90,478.40-135,847.20-51,112.40

Finding the Fourth Proportional to 90,478.40, 135,847.20 and 51,112.40

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Solution

The fourth proportional to 90,478.40, 135,847.20 and 51,112.40 is: 76,741.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,478.40 : 135,847.20 = 51,112.40 : x
  2. Step 2: Convert to fraction form
    90,478.40/135,847.20 = 51,112.40/x
  3. Step 3: Cross multiply
    90,478.40x = 135,847.20 × 51,112.40
  4. Step 4: Simplify right side
    90,478.40x = 6,943,476,425.28
  5. Step 5: Solve for x
    x = 6,943,476,425.28/90,478.40
  6. Step 6: Final answer
    x = 76,741.81

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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.