Home / 83,653.20-115,390.70-49,639.28

Finding the Fourth Proportional to 83,653.20, 115,390.70 and 49,639.28

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Solution

The fourth proportional to 83,653.20, 115,390.70 and 49,639.28 is: 68,472.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,653.20 : 115,390.70 = 49,639.28 : x
  2. Step 2: Convert to fraction form
    83,653.20/115,390.70 = 49,639.28/x
  3. Step 3: Cross multiply
    83,653.20x = 115,390.70 × 49,639.28
  4. Step 4: Simplify right side
    83,653.20x = 5,727,911,266.70
  5. Step 5: Solve for x
    x = 5,727,911,266.70/83,653.20
  6. Step 6: Final answer
    x = 68,472.11

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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.