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Finding the Fourth Proportional to 139,879.30, 209,880.96 and 73,303.60

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Solution

The fourth proportional to 139,879.30, 209,880.96 and 73,303.60 is: 109,987.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,879.30 : 209,880.96 = 73,303.60 : x
  2. Step 2: Convert to fraction form
    139,879.30/209,880.96 = 73,303.60/x
  3. Step 3: Cross multiply
    139,879.30x = 209,880.96 × 73,303.60
  4. Step 4: Simplify right side
    139,879.30x = 15,385,029,939.46
  5. Step 5: Solve for x
    x = 15,385,029,939.46/139,879.30
  6. Step 6: Final answer
    x = 109,987.90

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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.