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Finding the Fourth Proportional to 138,899.28, 208,363.56 and 45,404.88

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Solution

The fourth proportional to 138,899.28, 208,363.56 and 45,404.88 is: 68,112.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,899.28 : 208,363.56 = 45,404.88 : x
  2. Step 2: Convert to fraction form
    138,899.28/208,363.56 = 45,404.88/x
  3. Step 3: Cross multiply
    138,899.28x = 208,363.56 × 45,404.88
  4. Step 4: Simplify right side
    138,899.28x = 9,460,722,438.17
  5. Step 5: Solve for x
    x = 9,460,722,438.17/138,899.28
  6. Step 6: Final answer
    x = 68,112.11

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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.