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Finding the Fourth Proportional to 48,286.80, 72,405.90 and 28,571.40

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Solution

The fourth proportional to 48,286.80, 72,405.90 and 28,571.40 is: 42,842.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,286.80 : 72,405.90 = 28,571.40 : x
  2. Step 2: Convert to fraction form
    48,286.80/72,405.90 = 28,571.40/x
  3. Step 3: Cross multiply
    48,286.80x = 72,405.90 × 28,571.40
  4. Step 4: Simplify right side
    48,286.80x = 2,068,737,931.26
  5. Step 5: Solve for x
    x = 2,068,737,931.26/48,286.80
  6. Step 6: Final answer
    x = 42,842.72

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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.