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Finding the Fourth Proportional to 128,536.31, 192,878.25 and 100,377.32

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Solution

The fourth proportional to 128,536.31, 192,878.25 and 100,377.32 is: 150,623.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,536.31 : 192,878.25 = 100,377.32 : x
  2. Step 2: Convert to fraction form
    128,536.31/192,878.25 = 100,377.32/x
  3. Step 3: Cross multiply
    128,536.31x = 192,878.25 × 100,377.32
  4. Step 4: Simplify right side
    128,536.31x = 19,360,601,853.27
  5. Step 5: Solve for x
    x = 19,360,601,853.27/128,536.31
  6. Step 6: Final answer
    x = 150,623.60

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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.