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Finding the Fourth Proportional to 68,607.55, 102,900.88 and 18,691.57

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Solution

The fourth proportional to 68,607.55, 102,900.88 and 18,691.57 is: 28,034.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,607.55 : 102,900.88 = 18,691.57 : x
  2. Step 2: Convert to fraction form
    68,607.55/102,900.88 = 18,691.57/x
  3. Step 3: Cross multiply
    68,607.55x = 102,900.88 × 18,691.57
  4. Step 4: Simplify right side
    68,607.55x = 1,923,379,001.58
  5. Step 5: Solve for x
    x = 1,923,379,001.58/68,607.55
  6. Step 6: Final answer
    x = 28,034.51

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1.5x scale

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.