Home / 128,945.44-177,941.76-71,581.28

Finding the Fourth Proportional to 128,945.44, 177,941.76 and 71,581.28

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Solution

The fourth proportional to 128,945.44, 177,941.76 and 71,581.28 is: 98,780.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,945.44 : 177,941.76 = 71,581.28 : x
  2. Step 2: Convert to fraction form
    128,945.44/177,941.76 = 71,581.28/x
  3. Step 3: Cross multiply
    128,945.44x = 177,941.76 × 71,581.28
  4. Step 4: Simplify right side
    128,945.44x = 12,737,298,946.25
  5. Step 5: Solve for x
    x = 12,737,298,946.25/128,945.44
  6. Step 6: Final answer
    x = 98,780.53

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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.