Home / 81,983.79-113,145.68-47,990.23

Finding the Fourth Proportional to 81,983.79, 113,145.68 and 47,990.23

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Solution

The fourth proportional to 81,983.79, 113,145.68 and 47,990.23 is: 66,231.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,983.79 : 113,145.68 = 47,990.23 : x
  2. Step 2: Convert to fraction form
    81,983.79/113,145.68 = 47,990.23/x
  3. Step 3: Cross multiply
    81,983.79x = 113,145.68 × 47,990.23
  4. Step 4: Simplify right side
    81,983.79x = 5,429,887,206.71
  5. Step 5: Solve for x
    x = 5,429,887,206.71/81,983.79
  6. Step 6: Final answer
    x = 66,231.23

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Double scale
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Similar ratio
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1.5x scale

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.