Home / 128,319,101.28-192,401,786.16-40,842,833.76

Finding the Fourth Proportional to 128,319,101.28, 192,401,786.16 and 40,842,833.76

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Solution

The fourth proportional to 128,319,101.28, 192,401,786.16 and 40,842,833.76 is: 61,239,784.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,319,101.28 : 192,401,786.16 = 40,842,833.76 : x
  2. Step 2: Convert to fraction form
    128,319,101.28/192,401,786.16 = 40,842,833.76/x
  3. Step 3: Cross multiply
    128,319,101.28x = 192,401,786.16 × 40,842,833.76
  4. Step 4: Simplify right side
    128,319,101.28x = 7,858,234,167,259,948
  5. Step 5: Solve for x
    x = 7,858,234,167,259,948/128,319,101.28
  6. Step 6: Final answer
    x = 61,239,784.95

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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.