Home / 78,589.20-117,870.84-25,278.51

Finding the Fourth Proportional to 78,589.20, 117,870.84 and 25,278.51

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Solution

The fourth proportional to 78,589.20, 117,870.84 and 25,278.51 is: 37,913.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,589.20 : 117,870.84 = 25,278.51 : x
  2. Step 2: Convert to fraction form
    78,589.20/117,870.84 = 25,278.51/x
  3. Step 3: Cross multiply
    78,589.20x = 117,870.84 × 25,278.51
  4. Step 4: Simplify right side
    78,589.20x = 2,979,599,207.65
  5. Step 5: Solve for x
    x = 2,979,599,207.65/78,589.20
  6. Step 6: Final answer
    x = 37,913.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.