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Finding the Fourth Proportional to 81,523.61, 122,293.80 and 28,215.49

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Solution

The fourth proportional to 81,523.61, 122,293.80 and 28,215.49 is: 42,326.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,523.61 : 122,293.80 = 28,215.49 : x
  2. Step 2: Convert to fraction form
    81,523.61/122,293.80 = 28,215.49/x
  3. Step 3: Cross multiply
    81,523.61x = 122,293.80 × 28,215.49
  4. Step 4: Simplify right side
    81,523.61x = 3,450,579,414.53
  5. Step 5: Solve for x
    x = 3,450,579,414.53/81,523.61
  6. Step 6: Final answer
    x = 42,326.13

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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.