Home / 128,945.24-177,939.78-71,587.04

Finding the Fourth Proportional to 128,945.24, 177,939.78 and 71,587.04

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Solution

The fourth proportional to 128,945.24, 177,939.78 and 71,587.04 is: 98,787.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,945.24 : 177,939.78 = 71,587.04 : x
  2. Step 2: Convert to fraction form
    128,945.24/177,939.78 = 71,587.04/x
  3. Step 3: Cross multiply
    128,945.24x = 177,939.78 × 71,587.04
  4. Step 4: Simplify right side
    128,945.24x = 12,738,182,148.45
  5. Step 5: Solve for x
    x = 12,738,182,148.45/128,945.24
  6. Step 6: Final answer
    x = 98,787.53

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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.