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Finding the Fourth Proportional to 86,290.65, 119,057.85 and 50,489.46

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Solution

The fourth proportional to 86,290.65, 119,057.85 and 50,489.46 is: 69,661.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,290.65 : 119,057.85 = 50,489.46 : x
  2. Step 2: Convert to fraction form
    86,290.65/119,057.85 = 50,489.46/x
  3. Step 3: Cross multiply
    86,290.65x = 119,057.85 × 50,489.46
  4. Step 4: Simplify right side
    86,290.65x = 6,011,166,555.26
  5. Step 5: Solve for x
    x = 6,011,166,555.26/86,290.65
  6. Step 6: Final answer
    x = 69,661.85

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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.