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Finding the Fourth Proportional to 138,677.75, 191,375.21 and 75,015.54

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Solution

The fourth proportional to 138,677.75, 191,375.21 and 75,015.54 is: 103,521.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,677.75 : 191,375.21 = 75,015.54 : x
  2. Step 2: Convert to fraction form
    138,677.75/191,375.21 = 75,015.54/x
  3. Step 3: Cross multiply
    138,677.75x = 191,375.21 × 75,015.54
  4. Step 4: Simplify right side
    138,677.75x = 14,356,114,720.76
  5. Step 5: Solve for x
    x = 14,356,114,720.76/138,677.75
  6. Step 6: Final answer
    x = 103,521.40

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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.