Home / 83,680.28-115,706.16-82,328.40

Finding the Fourth Proportional to 83,680.28, 115,706.16 and 82,328.40

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Solution

The fourth proportional to 83,680.28, 115,706.16 and 82,328.40 is: 113,836.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,680.28 : 115,706.16 = 82,328.40 : x
  2. Step 2: Convert to fraction form
    83,680.28/115,706.16 = 82,328.40/x
  3. Step 3: Cross multiply
    83,680.28x = 115,706.16 × 82,328.40
  4. Step 4: Simplify right side
    83,680.28x = 9,525,903,022.94
  5. Step 5: Solve for x
    x = 9,525,903,022.94/83,680.28
  6. Step 6: Final answer
    x = 113,836.89

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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.