Home / 78,029.20-117,042.64-18,864.48

Finding the Fourth Proportional to 78,029.20, 117,042.64 and 18,864.48

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Solution

The fourth proportional to 78,029.20, 117,042.64 and 18,864.48 is: 28,296.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,029.20 : 117,042.64 = 18,864.48 : x
  2. Step 2: Convert to fraction form
    78,029.20/117,042.64 = 18,864.48/x
  3. Step 3: Cross multiply
    78,029.20x = 117,042.64 × 18,864.48
  4. Step 4: Simplify right side
    78,029.20x = 2,207,948,541.43
  5. Step 5: Solve for x
    x = 2,207,948,541.43/78,029.20
  6. Step 6: Final answer
    x = 28,296.44

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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.