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Finding the Fourth Proportional to 66,399.46, 99,590.90 and 26,918.64

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Solution

The fourth proportional to 66,399.46, 99,590.90 and 26,918.64 is: 40,374.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,399.46 : 99,590.90 = 26,918.64 : x
  2. Step 2: Convert to fraction form
    66,399.46/99,590.90 = 26,918.64/x
  3. Step 3: Cross multiply
    66,399.46x = 99,590.90 × 26,918.64
  4. Step 4: Simplify right side
    66,399.46x = 2,680,851,584.38
  5. Step 5: Solve for x
    x = 2,680,851,584.38/66,399.46
  6. Step 6: Final answer
    x = 40,374.60

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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.