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Finding the Fourth Proportional to 128,685.15, 192,817.06 and 123,764.40

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Solution

The fourth proportional to 128,685.15, 192,817.06 and 123,764.40 is: 185,443.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,685.15 : 192,817.06 = 123,764.40 : x
  2. Step 2: Convert to fraction form
    128,685.15/192,817.06 = 123,764.40/x
  3. Step 3: Cross multiply
    128,685.15x = 192,817.06 × 123,764.40
  4. Step 4: Simplify right side
    128,685.15x = 23,863,887,431.25
  5. Step 5: Solve for x
    x = 23,863,887,431.25/128,685.15
  6. Step 6: Final answer
    x = 185,443.99

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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.