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Finding the Fourth Proportional to 139,033.20, 208,549.80 and 79,984.20

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Solution

The fourth proportional to 139,033.20, 208,549.80 and 79,984.20 is: 119,976.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,033.20 : 208,549.80 = 79,984.20 : x
  2. Step 2: Convert to fraction form
    139,033.20/208,549.80 = 79,984.20/x
  3. Step 3: Cross multiply
    139,033.20x = 208,549.80 × 79,984.20
  4. Step 4: Simplify right side
    139,033.20x = 16,680,688,913.16
  5. Step 5: Solve for x
    x = 16,680,688,913.16/139,033.20
  6. Step 6: Final answer
    x = 119,976.30

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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.