Home / 128,970.30-177,979.74-71,610.42

Finding the Fourth Proportional to 128,970.30, 177,979.74 and 71,610.42

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Solution

The fourth proportional to 128,970.30, 177,979.74 and 71,610.42 is: 98,822.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,970.30 : 177,979.74 = 71,610.42 : x
  2. Step 2: Convert to fraction form
    128,970.30/177,979.74 = 71,610.42/x
  3. Step 3: Cross multiply
    128,970.30x = 177,979.74 × 71,610.42
  4. Step 4: Simplify right side
    128,970.30x = 12,745,203,932.89
  5. Step 5: Solve for x
    x = 12,745,203,932.89/128,970.30
  6. Step 6: Final answer
    x = 98,822.78

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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.