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Finding the Fourth Proportional to 87,607.50, 120,919.95 and 49,903.98

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Solution

The fourth proportional to 87,607.50, 120,919.95 and 49,903.98 is: 68,879.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,607.50 : 120,919.95 = 49,903.98 : x
  2. Step 2: Convert to fraction form
    87,607.50/120,919.95 = 49,903.98/x
  3. Step 3: Cross multiply
    87,607.50x = 120,919.95 × 49,903.98
  4. Step 4: Simplify right side
    87,607.50x = 6,034,386,766.40
  5. Step 5: Solve for x
    x = 6,034,386,766.40/87,607.50
  6. Step 6: Final answer
    x = 68,879.80

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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.