Home / 205,311.45-307,868.76-105,420.24

Finding the Fourth Proportional to 205,311.45, 307,868.76 and 105,420.24

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Solution

The fourth proportional to 205,311.45, 307,868.76 and 105,420.24 is: 158,079.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,311.45 : 307,868.76 = 105,420.24 : x
  2. Step 2: Convert to fraction form
    205,311.45/307,868.76 = 105,420.24/x
  3. Step 3: Cross multiply
    205,311.45x = 307,868.76 × 105,420.24
  4. Step 4: Simplify right side
    205,311.45x = 32,455,598,567.70
  5. Step 5: Solve for x
    x = 32,455,598,567.70/205,311.45
  6. Step 6: Final answer
    x = 158,079.83

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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.