Home / 128,133.92-176,813.04-82,813.28

Finding the Fourth Proportional to 128,133.92, 176,813.04 and 82,813.28

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Solution

The fourth proportional to 128,133.92, 176,813.04 and 82,813.28 is: 114,274.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,133.92 : 176,813.04 = 82,813.28 : x
  2. Step 2: Convert to fraction form
    128,133.92/176,813.04 = 82,813.28/x
  3. Step 3: Cross multiply
    128,133.92x = 176,813.04 × 82,813.28
  4. Step 4: Simplify right side
    128,133.92x = 14,642,467,789.17
  5. Step 5: Solve for x
    x = 14,642,467,789.17/128,133.92
  6. Step 6: Final answer
    x = 114,274.72

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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.