Home / 128,425.29-177,240.24-73,979.34

Finding the Fourth Proportional to 128,425.29, 177,240.24 and 73,979.34

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Solution

The fourth proportional to 128,425.29, 177,240.24 and 73,979.34 is: 102,099.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,425.29 : 177,240.24 = 73,979.34 : x
  2. Step 2: Convert to fraction form
    128,425.29/177,240.24 = 73,979.34/x
  3. Step 3: Cross multiply
    128,425.29x = 177,240.24 × 73,979.34
  4. Step 4: Simplify right side
    128,425.29x = 13,112,115,976.64
  5. Step 5: Solve for x
    x = 13,112,115,976.64/128,425.29
  6. Step 6: Final answer
    x = 102,099.17

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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.