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Finding the Fourth Proportional to 80,648.88, 121,007.88 and 28,029.66

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Solution

The fourth proportional to 80,648.88, 121,007.88 and 28,029.66 is: 42,056.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,648.88 : 121,007.88 = 28,029.66 : x
  2. Step 2: Convert to fraction form
    80,648.88/121,007.88 = 28,029.66/x
  3. Step 3: Cross multiply
    80,648.88x = 121,007.88 × 28,029.66
  4. Step 4: Simplify right side
    80,648.88x = 3,391,809,733.72
  5. Step 5: Solve for x
    x = 3,391,809,733.72/80,648.88
  6. Step 6: Final answer
    x = 42,056.50

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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.