Home / 128,455.56-177,268.68-71,880.24

Finding the Fourth Proportional to 128,455.56, 177,268.68 and 71,880.24

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Solution

The fourth proportional to 128,455.56, 177,268.68 and 71,880.24 is: 99,194.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,455.56 : 177,268.68 = 71,880.24 : x
  2. Step 2: Convert to fraction form
    128,455.56/177,268.68 = 71,880.24/x
  3. Step 3: Cross multiply
    128,455.56x = 177,268.68 × 71,880.24
  4. Step 4: Simplify right side
    128,455.56x = 12,742,115,262.88
  5. Step 5: Solve for x
    x = 12,742,115,262.88/128,455.56
  6. Step 6: Final answer
    x = 99,194.74

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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.