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Finding the Fourth Proportional to 138,903.78, 191,686.04 and 75,241.42

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Solution

The fourth proportional to 138,903.78, 191,686.04 and 75,241.42 is: 103,832.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,903.78 : 191,686.04 = 75,241.42 : x
  2. Step 2: Convert to fraction form
    138,903.78/191,686.04 = 75,241.42/x
  3. Step 3: Cross multiply
    138,903.78x = 191,686.04 × 75,241.42
  4. Step 4: Simplify right side
    138,903.78x = 14,422,729,843.78
  5. Step 5: Solve for x
    x = 14,422,729,843.78/138,903.78
  6. Step 6: Final answer
    x = 103,832.52

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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.