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Finding the Fourth Proportional to 139,624.20, 209,436.30 and 139,624.20

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Solution

The fourth proportional to 139,624.20, 209,436.30 and 139,624.20 is: 209,436.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,624.20 : 209,436.30 = 139,624.20 : x
  2. Step 2: Convert to fraction form
    139,624.20/209,436.30 = 139,624.20/x
  3. Step 3: Cross multiply
    139,624.20x = 209,436.30 × 139,624.20
  4. Step 4: Simplify right side
    139,624.20x = 29,242,375,838.46
  5. Step 5: Solve for x
    x = 29,242,375,838.46/139,624.20
  6. Step 6: Final answer
    x = 209,436.30

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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.