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Finding the Fourth Proportional to 68,611.70, 102,715.95 and 51,158.90

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Solution

The fourth proportional to 68,611.70, 102,715.95 and 51,158.90 is: 76,588.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,611.70 : 102,715.95 = 51,158.90 : x
  2. Step 2: Convert to fraction form
    68,611.70/102,715.95 = 51,158.90/x
  3. Step 3: Cross multiply
    68,611.70x = 102,715.95 × 51,158.90
  4. Step 4: Simplify right side
    68,611.70x = 5,254,835,014.46
  5. Step 5: Solve for x
    x = 5,254,835,014.46/68,611.70
  6. Step 6: Final answer
    x = 76,588.03

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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.