Home / 128,822.45-177,774.82-71,470.46

Finding the Fourth Proportional to 128,822.45, 177,774.82 and 71,470.46

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Solution

The fourth proportional to 128,822.45, 177,774.82 and 71,470.46 is: 98,629.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,822.45 : 177,774.82 = 71,470.46 : x
  2. Step 2: Convert to fraction form
    128,822.45/177,774.82 = 71,470.46/x
  3. Step 3: Cross multiply
    128,822.45x = 177,774.82 × 71,470.46
  4. Step 4: Simplify right side
    128,822.45x = 12,705,648,427.58
  5. Step 5: Solve for x
    x = 12,705,648,427.58/128,822.45
  6. Step 6: Final answer
    x = 98,629.15

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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.