Home / 205,101.20-307,421.40-105,222.80

Finding the Fourth Proportional to 205,101.20, 307,421.40 and 105,222.80

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Solution

The fourth proportional to 205,101.20, 307,421.40 and 105,222.80 is: 157,716.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,101.20 : 307,421.40 = 105,222.80 : x
  2. Step 2: Convert to fraction form
    205,101.20/307,421.40 = 105,222.80/x
  3. Step 3: Cross multiply
    205,101.20x = 307,421.40 × 105,222.80
  4. Step 4: Simplify right side
    205,101.20x = 32,347,740,487.92
  5. Step 5: Solve for x
    x = 32,347,740,487.92/205,101.20
  6. Step 6: Final answer
    x = 157,716.00

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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.