Home / 128,660.52-177,558.36-71,306.12

Finding the Fourth Proportional to 128,660.52, 177,558.36 and 71,306.12

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Solution

The fourth proportional to 128,660.52, 177,558.36 and 71,306.12 is: 98,406.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,660.52 : 177,558.36 = 71,306.12 : x
  2. Step 2: Convert to fraction form
    128,660.52/177,558.36 = 71,306.12/x
  3. Step 3: Cross multiply
    128,660.52x = 177,558.36 × 71,306.12
  4. Step 4: Simplify right side
    128,660.52x = 12,660,996,837.37
  5. Step 5: Solve for x
    x = 12,660,996,837.37/128,660.52
  6. Step 6: Final answer
    x = 98,406.23

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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.