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Finding the Fourth Proportional to 73,020.30, 100,768.12 and 39,486.30

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Solution

The fourth proportional to 73,020.30, 100,768.12 and 39,486.30 is: 54,491.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,020.30 : 100,768.12 = 39,486.30 : x
  2. Step 2: Convert to fraction form
    73,020.30/100,768.12 = 39,486.30/x
  3. Step 3: Cross multiply
    73,020.30x = 100,768.12 × 39,486.30
  4. Step 4: Simplify right side
    73,020.30x = 3,978,960,216.76
  5. Step 5: Solve for x
    x = 3,978,960,216.76/73,020.30
  6. Step 6: Final answer
    x = 54,491.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.