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Finding the Fourth Proportional to 45,833.97, 68,711.77 and 20,865.12

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Solution

The fourth proportional to 45,833.97, 68,711.77 and 20,865.12 is: 31,279.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,833.97 : 68,711.77 = 20,865.12 : x
  2. Step 2: Convert to fraction form
    45,833.97/68,711.77 = 20,865.12/x
  3. Step 3: Cross multiply
    45,833.97x = 68,711.77 × 20,865.12
  4. Step 4: Simplify right side
    45,833.97x = 1,433,679,326.46
  5. Step 5: Solve for x
    x = 1,433,679,326.46/45,833.97
  6. Step 6: Final answer
    x = 31,279.84

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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.