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Finding the Fourth Proportional to 68,000.60, 102,000.90 and 51,411.80

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Solution

The fourth proportional to 68,000.60, 102,000.90 and 51,411.80 is: 77,117.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,000.60 : 102,000.90 = 51,411.80 : x
  2. Step 2: Convert to fraction form
    68,000.60/102,000.90 = 51,411.80/x
  3. Step 3: Cross multiply
    68,000.60x = 102,000.90 × 51,411.80
  4. Step 4: Simplify right side
    68,000.60x = 5,244,049,870.62
  5. Step 5: Solve for x
    x = 5,244,049,870.62/68,000.60
  6. Step 6: Final answer
    x = 77,117.70

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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.