Home / 128,051,195.70-191,824,851.15-76,780,917.30

Finding the Fourth Proportional to 128,051,195.70, 191,824,851.15 and 76,780,917.30

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Solution

The fourth proportional to 128,051,195.70, 191,824,851.15 and 76,780,917.30 is: 115,020,308.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,051,195.70 : 191,824,851.15 = 76,780,917.30 : x
  2. Step 2: Convert to fraction form
    128,051,195.70/191,824,851.15 = 76,780,917.30/x
  3. Step 3: Cross multiply
    128,051,195.70x = 191,824,851.15 × 76,780,917.30
  4. Step 4: Simplify right side
    128,051,195.70x = 14,728,488,032,232,960
  5. Step 5: Solve for x
    x = 14,728,488,032,232,960/128,051,195.70
  6. Step 6: Final answer
    x = 115,020,308.49

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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.