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Finding the Fourth Proportional to 187,904.70, 281,200.95 and 128,855.70

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Solution

The fourth proportional to 187,904.70, 281,200.95 and 128,855.70 is: 192,833.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,904.70 : 281,200.95 = 128,855.70 : x
  2. Step 2: Convert to fraction form
    187,904.70/281,200.95 = 128,855.70/x
  3. Step 3: Cross multiply
    187,904.70x = 281,200.95 × 128,855.70
  4. Step 4: Simplify right side
    187,904.70x = 36,234,345,252.92
  5. Step 5: Solve for x
    x = 36,234,345,252.92/187,904.70
  6. Step 6: Final answer
    x = 192,833.63

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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.