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Finding the Fourth Proportional to 138,238.45, 207,372.39 and 38,398.84

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Solution

The fourth proportional to 138,238.45, 207,372.39 and 38,398.84 is: 57,602.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,238.45 : 207,372.39 = 38,398.84 : x
  2. Step 2: Convert to fraction form
    138,238.45/207,372.39 = 38,398.84/x
  3. Step 3: Cross multiply
    138,238.45x = 207,372.39 × 38,398.84
  4. Step 4: Simplify right side
    138,238.45x = 7,962,859,224.03
  5. Step 5: Solve for x
    x = 7,962,859,224.03/138,238.45
  6. Step 6: Final answer
    x = 57,602.35

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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.