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Finding the Fourth Proportional to 208,863.60, 313,295.40 and 129,937.20

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Solution

The fourth proportional to 208,863.60, 313,295.40 and 129,937.20 is: 194,905.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,863.60 : 313,295.40 = 129,937.20 : x
  2. Step 2: Convert to fraction form
    208,863.60/313,295.40 = 129,937.20/x
  3. Step 3: Cross multiply
    208,863.60x = 313,295.40 × 129,937.20
  4. Step 4: Simplify right side
    208,863.60x = 40,708,727,048.88
  5. Step 5: Solve for x
    x = 40,708,727,048.88/208,863.60
  6. Step 6: Final answer
    x = 194,905.80

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1.5x scale

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.