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Finding the Fourth Proportional to 47,204.20, 70,911.90 and 39,428.20

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Solution

The fourth proportional to 47,204.20, 70,911.90 and 39,428.20 is: 59,230.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,204.20 : 70,911.90 = 39,428.20 : x
  2. Step 2: Convert to fraction form
    47,204.20/70,911.90 = 39,428.20/x
  3. Step 3: Cross multiply
    47,204.20x = 70,911.90 × 39,428.20
  4. Step 4: Simplify right side
    47,204.20x = 2,795,928,575.58
  5. Step 5: Solve for x
    x = 2,795,928,575.58/47,204.20
  6. Step 6: Final answer
    x = 59,230.50

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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.