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Finding the Fourth Proportional to 66,752.92, 100,145.76 and 20,005.75

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Solution

The fourth proportional to 66,752.92, 100,145.76 and 20,005.75 is: 30,013.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,752.92 : 100,145.76 = 20,005.75 : x
  2. Step 2: Convert to fraction form
    66,752.92/100,145.76 = 20,005.75/x
  3. Step 3: Cross multiply
    66,752.92x = 100,145.76 × 20,005.75
  4. Step 4: Simplify right side
    66,752.92x = 2,003,491,038.12
  5. Step 5: Solve for x
    x = 2,003,491,038.12/66,752.92
  6. Step 6: Final answer
    x = 30,013.53

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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.