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Finding the Fourth Proportional to 139,993.20, 209,989.80 and 118,123.20

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Solution

The fourth proportional to 139,993.20, 209,989.80 and 118,123.20 is: 177,184.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,993.20 : 209,989.80 = 118,123.20 : x
  2. Step 2: Convert to fraction form
    139,993.20/209,989.80 = 118,123.20/x
  3. Step 3: Cross multiply
    139,993.20x = 209,989.80 × 118,123.20
  4. Step 4: Simplify right side
    139,993.20x = 24,804,667,143.36
  5. Step 5: Solve for x
    x = 24,804,667,143.36/139,993.20
  6. Step 6: Final answer
    x = 177,184.80

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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.