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Finding the Fourth Proportional to 47,942.20, 71,978.10 and 30,446.20

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Solution

The fourth proportional to 47,942.20, 71,978.10 and 30,446.20 is: 45,710.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,942.20 : 71,978.10 = 30,446.20 : x
  2. Step 2: Convert to fraction form
    47,942.20/71,978.10 = 30,446.20/x
  3. Step 3: Cross multiply
    47,942.20x = 71,978.10 × 30,446.20
  4. Step 4: Simplify right side
    47,942.20x = 2,191,459,628.22
  5. Step 5: Solve for x
    x = 2,191,459,628.22/47,942.20
  6. Step 6: Final answer
    x = 45,710.45

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1.5x scale

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.