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Finding the Fourth Proportional to 139,880.80, 209,883.21 and 73,305.10

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Solution

The fourth proportional to 139,880.80, 209,883.21 and 73,305.10 is: 109,990.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,880.80 : 209,883.21 = 73,305.10 : x
  2. Step 2: Convert to fraction form
    139,880.80/209,883.21 = 73,305.10/x
  3. Step 3: Cross multiply
    139,880.80x = 209,883.21 × 73,305.10
  4. Step 4: Simplify right side
    139,880.80x = 15,385,509,697.37
  5. Step 5: Solve for x
    x = 15,385,509,697.37/139,880.80
  6. Step 6: Final answer
    x = 109,990.15

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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.