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Finding the Fourth Proportional to 139,482.80, 209,224.20 and 50,739.20

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Solution

The fourth proportional to 139,482.80, 209,224.20 and 50,739.20 is: 76,108.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,482.80 : 209,224.20 = 50,739.20 : x
  2. Step 2: Convert to fraction form
    139,482.80/209,224.20 = 50,739.20/x
  3. Step 3: Cross multiply
    139,482.80x = 209,224.20 × 50,739.20
  4. Step 4: Simplify right side
    139,482.80x = 10,615,868,528.64
  5. Step 5: Solve for x
    x = 10,615,868,528.64/139,482.80
  6. Step 6: Final answer
    x = 76,108.80

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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.