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Finding the Fourth Proportional to 48,620.20, 72,930.30 and 20,918.20

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Solution

The fourth proportional to 48,620.20, 72,930.30 and 20,918.20 is: 31,377.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,620.20 : 72,930.30 = 20,918.20 : x
  2. Step 2: Convert to fraction form
    48,620.20/72,930.30 = 20,918.20/x
  3. Step 3: Cross multiply
    48,620.20x = 72,930.30 × 20,918.20
  4. Step 4: Simplify right side
    48,620.20x = 1,525,570,601.46
  5. Step 5: Solve for x
    x = 1,525,570,601.46/48,620.20
  6. Step 6: Final answer
    x = 31,377.30

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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.