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Finding the Fourth Proportional to 206,777.70, 310,220.55 and 66,539.70

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Solution

The fourth proportional to 206,777.70, 310,220.55 and 66,539.70 is: 99,826.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,777.70 : 310,220.55 = 66,539.70 : x
  2. Step 2: Convert to fraction form
    206,777.70/310,220.55 = 66,539.70/x
  3. Step 3: Cross multiply
    206,777.70x = 310,220.55 × 66,539.70
  4. Step 4: Simplify right side
    206,777.70x = 20,641,982,330.84
  5. Step 5: Solve for x
    x = 20,641,982,330.84/206,777.70
  6. Step 6: Final answer
    x = 99,826.93

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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.