Home / 67,979.10-102,005.10-28,540.20

Finding the Fourth Proportional to 67,979.10, 102,005.10 and 28,540.20

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Solution

The fourth proportional to 67,979.10, 102,005.10 and 28,540.20 is: 42,825.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,979.10 : 102,005.10 = 28,540.20 : x
  2. Step 2: Convert to fraction form
    67,979.10/102,005.10 = 28,540.20/x
  3. Step 3: Cross multiply
    67,979.10x = 102,005.10 × 28,540.20
  4. Step 4: Simplify right side
    67,979.10x = 2,911,245,955.02
  5. Step 5: Solve for x
    x = 2,911,245,955.02/67,979.10
  6. Step 6: Final answer
    x = 42,825.60

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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.