Home / 205,151.40-307,759.50-86,823.36

Finding the Fourth Proportional to 205,151.40, 307,759.50 and 86,823.36

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Solution

The fourth proportional to 205,151.40, 307,759.50 and 86,823.36 is: 130,248.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,151.40 : 307,759.50 = 86,823.36 : x
  2. Step 2: Convert to fraction form
    205,151.40/307,759.50 = 86,823.36/x
  3. Step 3: Cross multiply
    205,151.40x = 307,759.50 × 86,823.36
  4. Step 4: Simplify right side
    205,151.40x = 26,720,713,861.92
  5. Step 5: Solve for x
    x = 26,720,713,861.92/205,151.40
  6. Step 6: Final answer
    x = 130,248.75

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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.