Home / 128,564.70-177,230.48-90,208.37

Finding the Fourth Proportional to 128,564.70, 177,230.48 and 90,208.37

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Solution

The fourth proportional to 128,564.70, 177,230.48 and 90,208.37 is: 124,355.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,564.70 : 177,230.48 = 90,208.37 : x
  2. Step 2: Convert to fraction form
    128,564.70/177,230.48 = 90,208.37/x
  3. Step 3: Cross multiply
    128,564.70x = 177,230.48 × 90,208.37
  4. Step 4: Simplify right side
    128,564.70x = 15,987,671,377.92
  5. Step 5: Solve for x
    x = 15,987,671,377.92/128,564.70
  6. Step 6: Final answer
    x = 124,355.06

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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.