Home / 99,409.11-137,188.35-56,975.83

Finding the Fourth Proportional to 99,409.11, 137,188.35 and 56,975.83

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Solution

The fourth proportional to 99,409.11, 137,188.35 and 56,975.83 is: 78,628.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,409.11 : 137,188.35 = 56,975.83 : x
  2. Step 2: Convert to fraction form
    99,409.11/137,188.35 = 56,975.83/x
  3. Step 3: Cross multiply
    99,409.11x = 137,188.35 × 56,975.83
  4. Step 4: Simplify right side
    99,409.11x = 7,816,420,107.58
  5. Step 5: Solve for x
    x = 7,816,420,107.58/99,409.11
  6. Step 6: Final answer
    x = 78,628.81

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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.