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Finding the Fourth Proportional to 47,795.80, 71,693.70 and 30,285.40

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Solution

The fourth proportional to 47,795.80, 71,693.70 and 30,285.40 is: 45,428.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,795.80 : 71,693.70 = 30,285.40 : x
  2. Step 2: Convert to fraction form
    47,795.80/71,693.70 = 30,285.40/x
  3. Step 3: Cross multiply
    47,795.80x = 71,693.70 × 30,285.40
  4. Step 4: Simplify right side
    47,795.80x = 2,171,272,381.98
  5. Step 5: Solve for x
    x = 2,171,272,381.98/47,795.80
  6. Step 6: Final answer
    x = 45,428.10

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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.