Home / 78,489.04-117,732.46-19,325.20

Finding the Fourth Proportional to 78,489.04, 117,732.46 and 19,325.20

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Solution

The fourth proportional to 78,489.04, 117,732.46 and 19,325.20 is: 28,987.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,489.04 : 117,732.46 = 19,325.20 : x
  2. Step 2: Convert to fraction form
    78,489.04/117,732.46 = 19,325.20/x
  3. Step 3: Cross multiply
    78,489.04x = 117,732.46 × 19,325.20
  4. Step 4: Simplify right side
    78,489.04x = 2,275,203,335.99
  5. Step 5: Solve for x
    x = 2,275,203,335.99/78,489.04
  6. Step 6: Final answer
    x = 28,987.53

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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.