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Finding the Fourth Proportional to 138,295.50, 207,474.45 and 42,241.32

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Solution

The fourth proportional to 138,295.50, 207,474.45 and 42,241.32 is: 63,371.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,295.50 : 207,474.45 = 42,241.32 : x
  2. Step 2: Convert to fraction form
    138,295.50/207,474.45 = 42,241.32/x
  3. Step 3: Cross multiply
    138,295.50x = 207,474.45 × 42,241.32
  4. Step 4: Simplify right side
    138,295.50x = 8,763,994,634.27
  5. Step 5: Solve for x
    x = 8,763,994,634.27/138,295.50
  6. Step 6: Final answer
    x = 63,371.51

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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.