Home / 128,787.50-193,292.43-89,372.30

Finding the Fourth Proportional to 128,787.50, 193,292.43 and 89,372.30

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Solution

The fourth proportional to 128,787.50, 193,292.43 and 89,372.30 is: 134,135.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,787.50 : 193,292.43 = 89,372.30 : x
  2. Step 2: Convert to fraction form
    128,787.50/193,292.43 = 89,372.30/x
  3. Step 3: Cross multiply
    128,787.50x = 193,292.43 × 89,372.30
  4. Step 4: Simplify right side
    128,787.50x = 17,274,987,740.08
  5. Step 5: Solve for x
    x = 17,274,987,740.08/128,787.50
  6. Step 6: Final answer
    x = 134,135.59

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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.