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Finding the Fourth Proportional to 82,780.40, 124,175.40 and 23,620.40

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Solution

The fourth proportional to 82,780.40, 124,175.40 and 23,620.40 is: 35,431.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,780.40 : 124,175.40 = 23,620.40 : x
  2. Step 2: Convert to fraction form
    82,780.40/124,175.40 = 23,620.40/x
  3. Step 3: Cross multiply
    82,780.40x = 124,175.40 × 23,620.40
  4. Step 4: Simplify right side
    82,780.40x = 2,933,072,618.16
  5. Step 5: Solve for x
    x = 2,933,072,618.16/82,780.40
  6. Step 6: Final answer
    x = 35,431.97

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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.