Home / 128,976.48-177,995.52-85,882.08

Finding the Fourth Proportional to 128,976.48, 177,995.52 and 85,882.08

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Solution

The fourth proportional to 128,976.48, 177,995.52 and 85,882.08 is: 118,522.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,976.48 : 177,995.52 = 85,882.08 : x
  2. Step 2: Convert to fraction form
    128,976.48/177,995.52 = 85,882.08/x
  3. Step 3: Cross multiply
    128,976.48x = 177,995.52 × 85,882.08
  4. Step 4: Simplify right side
    128,976.48x = 15,286,625,488.28
  5. Step 5: Solve for x
    x = 15,286,625,488.28/128,976.48
  6. Step 6: Final answer
    x = 118,522.58

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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.