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Finding the Fourth Proportional to 48,406.80, 72,591.60 and 28,690.80

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Solution

The fourth proportional to 48,406.80, 72,591.60 and 28,690.80 is: 43,025.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,406.80 : 72,591.60 = 28,690.80 : x
  2. Step 2: Convert to fraction form
    48,406.80/72,591.60 = 28,690.80/x
  3. Step 3: Cross multiply
    48,406.80x = 72,591.60 × 28,690.80
  4. Step 4: Simplify right side
    48,406.80x = 2,082,711,077.28
  5. Step 5: Solve for x
    x = 2,082,711,077.28/48,406.80
  6. Step 6: Final answer
    x = 43,025.18

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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.