Home / 115,623.20-159,694.80-77,837.60

Finding the Fourth Proportional to 115,623.20, 159,694.80 and 77,837.60

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Solution

The fourth proportional to 115,623.20, 159,694.80 and 77,837.60 is: 107,506.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,623.20 : 159,694.80 = 77,837.60 : x
  2. Step 2: Convert to fraction form
    115,623.20/159,694.80 = 77,837.60/x
  3. Step 3: Cross multiply
    115,623.20x = 159,694.80 × 77,837.60
  4. Step 4: Simplify right side
    115,623.20x = 12,430,259,964.48
  5. Step 5: Solve for x
    x = 12,430,259,964.48/115,623.20
  6. Step 6: Final answer
    x = 107,506.62

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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.