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Finding the Fourth Proportional to 208,108.80, 312,213.60 and 60,364.80

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Solution

The fourth proportional to 208,108.80, 312,213.60 and 60,364.80 is: 90,561.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,108.80 : 312,213.60 = 60,364.80 : x
  2. Step 2: Convert to fraction form
    208,108.80/312,213.60 = 60,364.80/x
  3. Step 3: Cross multiply
    208,108.80x = 312,213.60 × 60,364.80
  4. Step 4: Simplify right side
    208,108.80x = 18,846,711,521.28
  5. Step 5: Solve for x
    x = 18,846,711,521.28/208,108.80
  6. Step 6: Final answer
    x = 90,561.82

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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.