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Finding the Fourth Proportional to 139,624.60, 209,436.90 and 100,258.60

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Solution

The fourth proportional to 139,624.60, 209,436.90 and 100,258.60 is: 150,387.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,624.60 : 209,436.90 = 100,258.60 : x
  2. Step 2: Convert to fraction form
    139,624.60/209,436.90 = 100,258.60/x
  3. Step 3: Cross multiply
    139,624.60x = 209,436.90 × 100,258.60
  4. Step 4: Simplify right side
    139,624.60x = 20,997,850,382.34
  5. Step 5: Solve for x
    x = 20,997,850,382.34/139,624.60
  6. Step 6: Final answer
    x = 150,387.90

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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.