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Finding the Fourth Proportional to 164,847.30, 247,076.55 and 85,920.90

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Solution

The fourth proportional to 164,847.30, 247,076.55 and 85,920.90 is: 128,780.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,847.30 : 247,076.55 = 85,920.90 : x
  2. Step 2: Convert to fraction form
    164,847.30/247,076.55 = 85,920.90/x
  3. Step 3: Cross multiply
    164,847.30x = 247,076.55 × 85,920.90
  4. Step 4: Simplify right side
    164,847.30x = 21,229,039,544.90
  5. Step 5: Solve for x
    x = 21,229,039,544.90/164,847.30
  6. Step 6: Final answer
    x = 128,780.03

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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.