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Finding the Fourth Proportional to 206,860.16, 310,338.84 and 66,613.52

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Solution

The fourth proportional to 206,860.16, 310,338.84 and 66,613.52 is: 99,935.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,860.16 : 310,338.84 = 66,613.52 : x
  2. Step 2: Convert to fraction form
    206,860.16/310,338.84 = 66,613.52/x
  3. Step 3: Cross multiply
    206,860.16x = 310,338.84 × 66,613.52
  4. Step 4: Simplify right side
    206,860.16x = 20,672,762,525.12
  5. Step 5: Solve for x
    x = 20,672,762,525.12/206,860.16
  6. Step 6: Final answer
    x = 99,935.93

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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.