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Finding the Fourth Proportional to 68,901.96, 103,172.50 and 45,134.74

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Solution

The fourth proportional to 68,901.96, 103,172.50 and 45,134.74 is: 67,583.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,901.96 : 103,172.50 = 45,134.74 : x
  2. Step 2: Convert to fraction form
    68,901.96/103,172.50 = 45,134.74/x
  3. Step 3: Cross multiply
    68,901.96x = 103,172.50 × 45,134.74
  4. Step 4: Simplify right side
    68,901.96x = 4,656,663,962.65
  5. Step 5: Solve for x
    x = 4,656,663,962.65/68,901.96
  6. Step 6: Final answer
    x = 67,583.91

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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.