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Finding the Fourth Proportional to 268,267.86, 402,463.98 and 78,720.54

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Solution

The fourth proportional to 268,267.86, 402,463.98 and 78,720.54 is: 118,099.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,267.86 : 402,463.98 = 78,720.54 : x
  2. Step 2: Convert to fraction form
    268,267.86/402,463.98 = 78,720.54/x
  3. Step 3: Cross multiply
    268,267.86x = 402,463.98 × 78,720.54
  4. Step 4: Simplify right side
    268,267.86x = 31,682,181,836.15
  5. Step 5: Solve for x
    x = 31,682,181,836.15/268,267.86
  6. Step 6: Final answer
    x = 118,099.06

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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.