Home / 128,051,243.20-191,824,922.40-76,780,964.80

Finding the Fourth Proportional to 128,051,243.20, 191,824,922.40 and 76,780,964.80

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Solution

The fourth proportional to 128,051,243.20, 191,824,922.40 and 76,780,964.80 is: 115,020,379.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,051,243.20 : 191,824,922.40 = 76,780,964.80 : x
  2. Step 2: Convert to fraction form
    128,051,243.20/191,824,922.40 = 76,780,964.80/x
  3. Step 3: Cross multiply
    128,051,243.20x = 191,824,922.40 × 76,780,964.80
  4. Step 4: Simplify right side
    128,051,243.20x = 14,728,502,614,557,132
  5. Step 5: Solve for x
    x = 14,728,502,614,557,132/128,051,243.20
  6. Step 6: Final answer
    x = 115,020,379.70

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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.