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Finding the Fourth Proportional to 86,993.60, 120,051.15 and 49,267.85

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Solution

The fourth proportional to 86,993.60, 120,051.15 and 49,267.85 is: 67,989.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,993.60 : 120,051.15 = 49,267.85 : x
  2. Step 2: Convert to fraction form
    86,993.60/120,051.15 = 49,267.85/x
  3. Step 3: Cross multiply
    86,993.60x = 120,051.15 × 49,267.85
  4. Step 4: Simplify right side
    86,993.60x = 5,914,661,265.52
  5. Step 5: Solve for x
    x = 5,914,661,265.52/86,993.60
  6. Step 6: Final answer
    x = 67,989.62

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1.5x scale

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.