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Finding the Fourth Proportional to 56,485.80, 84,728.70 and 43,801.20

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Solution

The fourth proportional to 56,485.80, 84,728.70 and 43,801.20 is: 65,701.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,485.80 : 84,728.70 = 43,801.20 : x
  2. Step 2: Convert to fraction form
    56,485.80/84,728.70 = 43,801.20/x
  3. Step 3: Cross multiply
    56,485.80x = 84,728.70 × 43,801.20
  4. Step 4: Simplify right side
    56,485.80x = 3,711,218,734.44
  5. Step 5: Solve for x
    x = 3,711,218,734.44/56,485.80
  6. Step 6: Final answer
    x = 65,701.80

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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.