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Finding the Fourth Proportional to 48,485.50, 66,910.80 and 31,718.50

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Solution

The fourth proportional to 48,485.50, 66,910.80 and 31,718.50 is: 43,772.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,485.50 : 66,910.80 = 31,718.50 : x
  2. Step 2: Convert to fraction form
    48,485.50/66,910.80 = 31,718.50/x
  3. Step 3: Cross multiply
    48,485.50x = 66,910.80 × 31,718.50
  4. Step 4: Simplify right side
    48,485.50x = 2,122,310,209.80
  5. Step 5: Solve for x
    x = 2,122,310,209.80/48,485.50
  6. Step 6: Final answer
    x = 43,772.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.