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Finding the Fourth Proportional to 138,620.33, 207,893.59 and 38,774.33

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Solution

The fourth proportional to 138,620.33, 207,893.59 and 38,774.33 is: 58,151.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,620.33 : 207,893.59 = 38,774.33 : x
  2. Step 2: Convert to fraction form
    138,620.33/207,893.59 = 38,774.33/x
  3. Step 3: Cross multiply
    138,620.33x = 207,893.59 × 38,774.33
  4. Step 4: Simplify right side
    138,620.33x = 8,060,934,663.54
  5. Step 5: Solve for x
    x = 8,060,934,663.54/138,620.33
  6. Step 6: Final answer
    x = 58,151.17

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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.