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Finding the Fourth Proportional to 208,552.60, 312,828.90 and 129,626.20

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Solution

The fourth proportional to 208,552.60, 312,828.90 and 129,626.20 is: 194,439.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,552.60 : 312,828.90 = 129,626.20 : x
  2. Step 2: Convert to fraction form
    208,552.60/312,828.90 = 129,626.20/x
  3. Step 3: Cross multiply
    208,552.60x = 312,828.90 × 129,626.20
  4. Step 4: Simplify right side
    208,552.60x = 40,550,821,557.18
  5. Step 5: Solve for x
    x = 40,550,821,557.18/208,552.60
  6. Step 6: Final answer
    x = 194,439.30

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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.