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Finding the Fourth Proportional to 137,696.03, 206,421.03 and 66,578.88

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Solution

The fourth proportional to 137,696.03, 206,421.03 and 66,578.88 is: 99,808.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,696.03 : 206,421.03 = 66,578.88 : x
  2. Step 2: Convert to fraction form
    137,696.03/206,421.03 = 66,578.88/x
  3. Step 3: Cross multiply
    137,696.03x = 206,421.03 × 66,578.88
  4. Step 4: Simplify right side
    137,696.03x = 13,743,280,985.85
  5. Step 5: Solve for x
    x = 13,743,280,985.85/137,696.03
  6. Step 6: Final answer
    x = 99,808.84

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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.