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Finding the Fourth Proportional to 139,750.40, 209,625.60 and 129,908.90

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Solution

The fourth proportional to 139,750.40, 209,625.60 and 129,908.90 is: 194,863.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,750.40 : 209,625.60 = 129,908.90 : x
  2. Step 2: Convert to fraction form
    139,750.40/209,625.60 = 129,908.90/x
  3. Step 3: Cross multiply
    139,750.40x = 209,625.60 × 129,908.90
  4. Step 4: Simplify right side
    139,750.40x = 27,232,231,107.84
  5. Step 5: Solve for x
    x = 27,232,231,107.84/139,750.40
  6. Step 6: Final answer
    x = 194,863.35

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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.