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Finding the Fourth Proportional to 138,794.60, 208,191.90 and 89,028.20

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Solution

The fourth proportional to 138,794.60, 208,191.90 and 89,028.20 is: 133,542.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,794.60 : 208,191.90 = 89,028.20 : x
  2. Step 2: Convert to fraction form
    138,794.60/208,191.90 = 89,028.20/x
  3. Step 3: Cross multiply
    138,794.60x = 208,191.90 × 89,028.20
  4. Step 4: Simplify right side
    138,794.60x = 18,534,950,111.58
  5. Step 5: Solve for x
    x = 18,534,950,111.58/138,794.60
  6. Step 6: Final answer
    x = 133,542.30

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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.