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Finding the Fourth Proportional to 100,181.50, 138,250.47 and 55,472.38

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Solution

The fourth proportional to 100,181.50, 138,250.47 and 55,472.38 is: 76,551.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,181.50 : 138,250.47 = 55,472.38 : x
  2. Step 2: Convert to fraction form
    100,181.50/138,250.47 = 55,472.38/x
  3. Step 3: Cross multiply
    100,181.50x = 138,250.47 × 55,472.38
  4. Step 4: Simplify right side
    100,181.50x = 7,669,082,607.02
  5. Step 5: Solve for x
    x = 7,669,082,607.02/100,181.50
  6. Step 6: Final answer
    x = 76,551.88

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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.