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Finding the Fourth Proportional to 72,702, 100,289.88 and 48,787.56

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Solution

The fourth proportional to 72,702, 100,289.88 and 48,787.56 is: 67,300.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,702 : 100,289.88 = 48,787.56 : x
  2. Step 2: Convert to fraction form
    72,702/100,289.88 = 48,787.56/x
  3. Step 3: Cross multiply
    72,702x = 100,289.88 × 48,787.56
  4. Step 4: Simplify right side
    72,702x = 4,892,898,537.89
  5. Step 5: Solve for x
    x = 4,892,898,537.89/72,702
  6. Step 6: Final answer
    x = 67,300.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.