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Finding the Fourth Proportional to 137,039.40, 205,616.70 and 74,754.60

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Solution

The fourth proportional to 137,039.40, 205,616.70 and 74,754.60 is: 112,163.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,039.40 : 205,616.70 = 74,754.60 : x
  2. Step 2: Convert to fraction form
    137,039.40/205,616.70 = 74,754.60/x
  3. Step 3: Cross multiply
    137,039.40x = 205,616.70 × 74,754.60
  4. Step 4: Simplify right side
    137,039.40x = 15,370,794,161.82
  5. Step 5: Solve for x
    x = 15,370,794,161.82/137,039.40
  6. Step 6: Final answer
    x = 112,163.32

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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.