Home / 139,179.20-208,833.60-72,694.40

Finding the Fourth Proportional to 139,179.20, 208,833.60 and 72,694.40

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Solution

The fourth proportional to 139,179.20, 208,833.60 and 72,694.40 is: 109,075.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,179.20 : 208,833.60 = 72,694.40 : x
  2. Step 2: Convert to fraction form
    139,179.20/208,833.60 = 72,694.40/x
  3. Step 3: Cross multiply
    139,179.20x = 208,833.60 × 72,694.40
  4. Step 4: Simplify right side
    139,179.20x = 15,181,033,251.84
  5. Step 5: Solve for x
    x = 15,181,033,251.84/139,179.20
  6. Step 6: Final answer
    x = 109,075.45

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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.