Home / 136,143.11-203,776.65-72,804.75

Finding the Fourth Proportional to 136,143.11, 203,776.65 and 72,804.75

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Solution

The fourth proportional to 136,143.11, 203,776.65 and 72,804.75 is: 108,972.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,143.11 : 203,776.65 = 72,804.75 : x
  2. Step 2: Convert to fraction form
    136,143.11/203,776.65 = 72,804.75/x
  3. Step 3: Cross multiply
    136,143.11x = 203,776.65 × 72,804.75
  4. Step 4: Simplify right side
    136,143.11x = 14,835,908,059.09
  5. Step 5: Solve for x
    x = 14,835,908,059.09/136,143.11
  6. Step 6: Final answer
    x = 108,972.89

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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.