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Finding the Fourth Proportional to 86,780.65, 119,755.71 and 49,054.90

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Solution

The fourth proportional to 86,780.65, 119,755.71 and 49,054.90 is: 67,694.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,780.65 : 119,755.71 = 49,054.90 : x
  2. Step 2: Convert to fraction form
    86,780.65/119,755.71 = 49,054.90/x
  3. Step 3: Cross multiply
    86,780.65x = 119,755.71 × 49,054.90
  4. Step 4: Simplify right side
    86,780.65x = 5,874,604,378.48
  5. Step 5: Solve for x
    x = 5,874,604,378.48/86,780.65
  6. Step 6: Final answer
    x = 67,694.86

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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.