Home / 128,371.17-177,138.58-71,001.37

Finding the Fourth Proportional to 128,371.17, 177,138.58 and 71,001.37

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Solution

The fourth proportional to 128,371.17, 177,138.58 and 71,001.37 is: 97,974.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,371.17 : 177,138.58 = 71,001.37 : x
  2. Step 2: Convert to fraction form
    128,371.17/177,138.58 = 71,001.37/x
  3. Step 3: Cross multiply
    128,371.17x = 177,138.58 × 71,001.37
  4. Step 4: Simplify right side
    128,371.17x = 12,577,081,859.85
  5. Step 5: Solve for x
    x = 12,577,081,859.85/128,371.17
  6. Step 6: Final answer
    x = 97,974.35

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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.