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Finding the Fourth Proportional to 90,453.64, 135,630.74 and 71,852.80

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Solution

The fourth proportional to 90,453.64, 135,630.74 and 71,852.80 is: 107,739.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,453.64 : 135,630.74 = 71,852.80 : x
  2. Step 2: Convert to fraction form
    90,453.64/135,630.74 = 71,852.80/x
  3. Step 3: Cross multiply
    90,453.64x = 135,630.74 × 71,852.80
  4. Step 4: Simplify right side
    90,453.64x = 9,745,448,435.07
  5. Step 5: Solve for x
    x = 9,745,448,435.07/90,453.64
  6. Step 6: Final answer
    x = 107,739.70

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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.