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Finding the Fourth Proportional to 206,038.70, 308,910.45 and 79,570.70

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Solution

The fourth proportional to 206,038.70, 308,910.45 and 79,570.70 is: 119,299.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,038.70 : 308,910.45 = 79,570.70 : x
  2. Step 2: Convert to fraction form
    206,038.70/308,910.45 = 79,570.70/x
  3. Step 3: Cross multiply
    206,038.70x = 308,910.45 × 79,570.70
  4. Step 4: Simplify right side
    206,038.70x = 24,580,220,743.82
  5. Step 5: Solve for x
    x = 24,580,220,743.82/206,038.70
  6. Step 6: Final answer
    x = 119,299.05

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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.