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Finding the Fourth Proportional to 128,453.80, 177,276.72 and 74,022.88

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Solution

The fourth proportional to 128,453.80, 177,276.72 and 74,022.88 is: 102,157.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,453.80 : 177,276.72 = 74,022.88 : x
  2. Step 2: Convert to fraction form
    128,453.80/177,276.72 = 74,022.88/x
  3. Step 3: Cross multiply
    128,453.80x = 177,276.72 × 74,022.88
  4. Step 4: Simplify right side
    128,453.80x = 13,122,533,371.35
  5. Step 5: Solve for x
    x = 13,122,533,371.35/128,453.80
  6. Step 6: Final answer
    x = 102,157.61

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1.5x scale

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.