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Finding the Fourth Proportional to 83,489.91, 115,220.79 and 49,518.51

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Solution

The fourth proportional to 83,489.91, 115,220.79 and 49,518.51 is: 68,338.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,489.91 : 115,220.79 = 49,518.51 : x
  2. Step 2: Convert to fraction form
    83,489.91/115,220.79 = 49,518.51/x
  3. Step 3: Cross multiply
    83,489.91x = 115,220.79 × 49,518.51
  4. Step 4: Simplify right side
    83,489.91x = 5,705,561,841.82
  5. Step 5: Solve for x
    x = 5,705,561,841.82/83,489.91
  6. Step 6: Final answer
    x = 68,338.34

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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.