Home / 205,351,499.28-307,819,859.76-128,728,233.84

Finding the Fourth Proportional to 205,351,499.28, 307,819,859.76 and 128,728,233.84

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Solution

The fourth proportional to 205,351,499.28, 307,819,859.76 and 128,728,233.84 is: 192,962,345.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,351,499.28 : 307,819,859.76 = 128,728,233.84 : x
  2. Step 2: Convert to fraction form
    205,351,499.28/307,819,859.76 = 128,728,233.84/x
  3. Step 3: Cross multiply
    205,351,499.28x = 307,819,859.76 × 128,728,233.84
  4. Step 4: Simplify right side
    205,351,499.28x = 39,625,106,887,781,288
  5. Step 5: Solve for x
    x = 39,625,106,887,781,288/205,351,499.28
  6. Step 6: Final answer
    x = 192,962,345.18

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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.