Home / 83,786.23-115,621.81-47,979.60

Finding the Fourth Proportional to 83,786.23, 115,621.81 and 47,979.60

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Solution

The fourth proportional to 83,786.23, 115,621.81 and 47,979.60 is: 66,210.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,786.23 : 115,621.81 = 47,979.60 : x
  2. Step 2: Convert to fraction form
    83,786.23/115,621.81 = 47,979.60/x
  3. Step 3: Cross multiply
    83,786.23x = 115,621.81 × 47,979.60
  4. Step 4: Simplify right side
    83,786.23x = 5,547,488,195.08
  5. Step 5: Solve for x
    x = 5,547,488,195.08/83,786.23
  6. Step 6: Final answer
    x = 66,210.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.