Home / 135,111.64-186,448.50-78,518.68

Finding the Fourth Proportional to 135,111.64, 186,448.50 and 78,518.68

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Solution

The fourth proportional to 135,111.64, 186,448.50 and 78,518.68 is: 108,352.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,111.64 : 186,448.50 = 78,518.68 : x
  2. Step 2: Convert to fraction form
    135,111.64/186,448.50 = 78,518.68/x
  3. Step 3: Cross multiply
    135,111.64x = 186,448.50 × 78,518.68
  4. Step 4: Simplify right side
    135,111.64x = 14,639,690,107.98
  5. Step 5: Solve for x
    x = 14,639,690,107.98/135,111.64
  6. Step 6: Final answer
    x = 108,352.55

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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.