Home / 128,628,138.30-192,942,207.45-74,208,579.90

Finding the Fourth Proportional to 128,628,138.30, 192,942,207.45 and 74,208,579.90

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Solution

The fourth proportional to 128,628,138.30, 192,942,207.45 and 74,208,579.90 is: 111,312,869.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,628,138.30 : 192,942,207.45 = 74,208,579.90 : x
  2. Step 2: Convert to fraction form
    128,628,138.30/192,942,207.45 = 74,208,579.90/x
  3. Step 3: Cross multiply
    128,628,138.30x = 192,942,207.45 × 74,208,579.90
  4. Step 4: Simplify right side
    128,628,138.30x = 14,317,967,217,635,700
  5. Step 5: Solve for x
    x = 14,317,967,217,635,700/128,628,138.30
  6. Step 6: Final answer
    x = 111,312,869.85

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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.