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Finding the Fourth Proportional to 81,115.67, 121,673.78 and 24,955.40

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Solution

The fourth proportional to 81,115.67, 121,673.78 and 24,955.40 is: 37,433.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,115.67 : 121,673.78 = 24,955.40 : x
  2. Step 2: Convert to fraction form
    81,115.67/121,673.78 = 24,955.40/x
  3. Step 3: Cross multiply
    81,115.67x = 121,673.78 × 24,955.40
  4. Step 4: Simplify right side
    81,115.67x = 3,036,418,215.98
  5. Step 5: Solve for x
    x = 3,036,418,215.98/81,115.67
  6. Step 6: Final answer
    x = 37,433.19

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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.