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Finding the Fourth Proportional to 82,690.97, 124,047.48 and 26,512.40

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Solution

The fourth proportional to 82,690.97, 124,047.48 and 26,512.40 is: 39,772.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,690.97 : 124,047.48 = 26,512.40 : x
  2. Step 2: Convert to fraction form
    82,690.97/124,047.48 = 26,512.40/x
  3. Step 3: Cross multiply
    82,690.97x = 124,047.48 × 26,512.40
  4. Step 4: Simplify right side
    82,690.97x = 3,288,795,788.51
  5. Step 5: Solve for x
    x = 3,288,795,788.51/82,690.97
  6. Step 6: Final answer
    x = 39,772.13

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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.