Home / 128,656.54-177,554.19-72,076.42

Finding the Fourth Proportional to 128,656.54, 177,554.19 and 72,076.42

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Solution

The fourth proportional to 128,656.54, 177,554.19 and 72,076.42 is: 99,470.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,656.54 : 177,554.19 = 72,076.42 : x
  2. Step 2: Convert to fraction form
    128,656.54/177,554.19 = 72,076.42/x
  3. Step 3: Cross multiply
    128,656.54x = 177,554.19 × 72,076.42
  4. Step 4: Simplify right side
    128,656.54x = 12,797,470,371.20
  5. Step 5: Solve for x
    x = 12,797,470,371.20/128,656.54
  6. Step 6: Final answer
    x = 99,470.03

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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.