Home / 83,642.70-115,376.20-49,628.77

Finding the Fourth Proportional to 83,642.70, 115,376.20 and 49,628.77

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Solution

The fourth proportional to 83,642.70, 115,376.20 and 49,628.77 is: 68,457.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,642.70 : 115,376.20 = 49,628.77 : x
  2. Step 2: Convert to fraction form
    83,642.70/115,376.20 = 49,628.77/x
  3. Step 3: Cross multiply
    83,642.70x = 115,376.20 × 49,628.77
  4. Step 4: Simplify right side
    83,642.70x = 5,725,978,893.27
  5. Step 5: Solve for x
    x = 5,725,978,893.27/83,642.70
  6. Step 6: Final answer
    x = 68,457.60

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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.