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Finding the Fourth Proportional to 206,817.70, 310,280.55 and 66,579.70

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Solution

The fourth proportional to 206,817.70, 310,280.55 and 66,579.70 is: 99,886.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,817.70 : 310,280.55 = 66,579.70 : x
  2. Step 2: Convert to fraction form
    206,817.70/310,280.55 = 66,579.70/x
  3. Step 3: Cross multiply
    206,817.70x = 310,280.55 × 66,579.70
  4. Step 4: Simplify right side
    206,817.70x = 20,658,385,934.84
  5. Step 5: Solve for x
    x = 20,658,385,934.84/206,817.70
  6. Step 6: Final answer
    x = 99,886.93

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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.