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Finding the Fourth Proportional to 128,492.31, 192,737.34 and 100,435.95

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Solution

The fourth proportional to 128,492.31, 192,737.34 and 100,435.95 is: 150,653.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,492.31 : 192,737.34 = 100,435.95 : x
  2. Step 2: Convert to fraction form
    128,492.31/192,737.34 = 100,435.95/x
  3. Step 3: Cross multiply
    128,492.31x = 192,737.34 × 100,435.95
  4. Step 4: Simplify right side
    128,492.31x = 19,357,757,843.37
  5. Step 5: Solve for x
    x = 19,357,757,843.37/128,492.31
  6. Step 6: Final answer
    x = 150,653.05

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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.