Home / 101,516.45-151,954.80-90,817.91

Finding the Fourth Proportional to 101,516.45, 151,954.80 and 90,817.91

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Solution

The fourth proportional to 101,516.45, 151,954.80 and 90,817.91 is: 135,940.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,516.45 : 151,954.80 = 90,817.91 : x
  2. Step 2: Convert to fraction form
    101,516.45/151,954.80 = 90,817.91/x
  3. Step 3: Cross multiply
    101,516.45x = 151,954.80 × 90,817.91
  4. Step 4: Simplify right side
    101,516.45x = 13,800,216,590.69
  5. Step 5: Solve for x
    x = 13,800,216,590.69/101,516.45
  6. Step 6: Final answer
    x = 135,940.70

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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.