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Finding the Fourth Proportional to 170,663.40, 255,787.47 and 120,757.86

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Solution

The fourth proportional to 170,663.40, 255,787.47 and 120,757.86 is: 180,989.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,663.40 : 255,787.47 = 120,757.86 : x
  2. Step 2: Convert to fraction form
    170,663.40/255,787.47 = 120,757.86/x
  3. Step 3: Cross multiply
    170,663.40x = 255,787.47 × 120,757.86
  4. Step 4: Simplify right side
    170,663.40x = 30,888,347,492.01
  5. Step 5: Solve for x
    x = 30,888,347,492.01/170,663.40
  6. Step 6: Final answer
    x = 180,989.88

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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.