Home / 138,934.11-191,729.25-75,271.89

Finding the Fourth Proportional to 138,934.11, 191,729.25 and 75,271.89

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Solution

The fourth proportional to 138,934.11, 191,729.25 and 75,271.89 is: 103,875.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,934.11 : 191,729.25 = 75,271.89 : x
  2. Step 2: Convert to fraction form
    138,934.11/191,729.25 = 75,271.89/x
  3. Step 3: Cross multiply
    138,934.11x = 191,729.25 × 75,271.89
  4. Step 4: Simplify right side
    138,934.11x = 14,431,823,015.78
  5. Step 5: Solve for x
    x = 14,431,823,015.78/138,934.11
  6. Step 6: Final answer
    x = 103,875.30

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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.