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Finding the Fourth Proportional to 47,787.80, 71,657.40 and 28,072.40

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Solution

The fourth proportional to 47,787.80, 71,657.40 and 28,072.40 is: 42,094.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,787.80 : 71,657.40 = 28,072.40 : x
  2. Step 2: Convert to fraction form
    47,787.80/71,657.40 = 28,072.40/x
  3. Step 3: Cross multiply
    47,787.80x = 71,657.40 × 28,072.40
  4. Step 4: Simplify right side
    47,787.80x = 2,011,595,195.76
  5. Step 5: Solve for x
    x = 2,011,595,195.76/47,787.80
  6. Step 6: Final answer
    x = 42,094.33

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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.