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Finding the Fourth Proportional to 138,047.76, 207,076.21 and 38,199.56

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Solution

The fourth proportional to 138,047.76, 207,076.21 and 38,199.56 is: 57,300.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,047.76 : 207,076.21 = 38,199.56 : x
  2. Step 2: Convert to fraction form
    138,047.76/207,076.21 = 38,199.56/x
  3. Step 3: Cross multiply
    138,047.76x = 207,076.21 × 38,199.56
  4. Step 4: Simplify right side
    138,047.76x = 7,910,218,977.59
  5. Step 5: Solve for x
    x = 7,910,218,977.59/138,047.76
  6. Step 6: Final answer
    x = 57,300.60

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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.