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Finding the Fourth Proportional to 83,881.70, 115,718.59 and 49,870.88

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Solution

The fourth proportional to 83,881.70, 115,718.59 and 49,870.88 is: 68,799.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,881.70 : 115,718.59 = 49,870.88 : x
  2. Step 2: Convert to fraction form
    83,881.70/115,718.59 = 49,870.88/x
  3. Step 3: Cross multiply
    83,881.70x = 115,718.59 × 49,870.88
  4. Step 4: Simplify right side
    83,881.70x = 5,770,987,915.66
  5. Step 5: Solve for x
    x = 5,770,987,915.66/83,881.70
  6. Step 6: Final answer
    x = 68,799.13

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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.