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Finding the Fourth Proportional to 136,398.30, 188,229.12 and 75,969.66

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Solution

The fourth proportional to 136,398.30, 188,229.12 and 75,969.66 is: 104,837.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,398.30 : 188,229.12 = 75,969.66 : x
  2. Step 2: Convert to fraction form
    136,398.30/188,229.12 = 75,969.66/x
  3. Step 3: Cross multiply
    136,398.30x = 188,229.12 × 75,969.66
  4. Step 4: Simplify right side
    136,398.30x = 14,299,702,248.50
  5. Step 5: Solve for x
    x = 14,299,702,248.50/136,398.30
  6. Step 6: Final answer
    x = 104,837.83

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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.