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Finding the Fourth Proportional to 45,805.60, 68,708.40 and 31,808.80

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Solution

The fourth proportional to 45,805.60, 68,708.40 and 31,808.80 is: 47,713.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,805.60 : 68,708.40 = 31,808.80 : x
  2. Step 2: Convert to fraction form
    45,805.60/68,708.40 = 31,808.80/x
  3. Step 3: Cross multiply
    45,805.60x = 68,708.40 × 31,808.80
  4. Step 4: Simplify right side
    45,805.60x = 2,185,531,753.92
  5. Step 5: Solve for x
    x = 2,185,531,753.92/45,805.60
  6. Step 6: Final answer
    x = 47,713.20

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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.