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Finding the Fourth Proportional to 73,087.80, 109,631.70 and 20,506.20

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Solution

The fourth proportional to 73,087.80, 109,631.70 and 20,506.20 is: 30,759.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,087.80 : 109,631.70 = 20,506.20 : x
  2. Step 2: Convert to fraction form
    73,087.80/109,631.70 = 20,506.20/x
  3. Step 3: Cross multiply
    73,087.80x = 109,631.70 × 20,506.20
  4. Step 4: Simplify right side
    73,087.80x = 2,248,129,566.54
  5. Step 5: Solve for x
    x = 2,248,129,566.54/73,087.80
  6. Step 6: Final answer
    x = 30,759.30

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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.