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Finding the Fourth Proportional to 84,648.86, 126,992.80 and 28,487.50

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Solution

The fourth proportional to 84,648.86, 126,992.80 and 28,487.50 is: 42,737.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,648.86 : 126,992.80 = 28,487.50 : x
  2. Step 2: Convert to fraction form
    84,648.86/126,992.80 = 28,487.50/x
  3. Step 3: Cross multiply
    84,648.86x = 126,992.80 × 28,487.50
  4. Step 4: Simplify right side
    84,648.86x = 3,617,707,390
  5. Step 5: Solve for x
    x = 3,617,707,390/84,648.86
  6. Step 6: Final answer
    x = 42,737.82

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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.