Home / 128,383.52-177,165.94-71,021.36

Finding the Fourth Proportional to 128,383.52, 177,165.94 and 71,021.36

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Solution

The fourth proportional to 128,383.52, 177,165.94 and 71,021.36 is: 98,007.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,383.52 : 177,165.94 = 71,021.36 : x
  2. Step 2: Convert to fraction form
    128,383.52/177,165.94 = 71,021.36/x
  3. Step 3: Cross multiply
    128,383.52x = 177,165.94 × 71,021.36
  4. Step 4: Simplify right side
    128,383.52x = 12,582,564,941.10
  5. Step 5: Solve for x
    x = 12,582,564,941.10/128,383.52
  6. Step 6: Final answer
    x = 98,007.64

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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.