Home / 71,979.10-107,968.65-66,730.30

Finding the Fourth Proportional to 71,979.10, 107,968.65 and 66,730.30

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Solution

The fourth proportional to 71,979.10, 107,968.65 and 66,730.30 is: 100,095.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,979.10 : 107,968.65 = 66,730.30 : x
  2. Step 2: Convert to fraction form
    71,979.10/107,968.65 = 66,730.30/x
  3. Step 3: Cross multiply
    71,979.10x = 107,968.65 × 66,730.30
  4. Step 4: Simplify right side
    71,979.10x = 7,204,780,405.10
  5. Step 5: Solve for x
    x = 7,204,780,405.10/71,979.10
  6. Step 6: Final answer
    x = 100,095.45

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1.5x scale

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.