Home / 128,967,393.50-177,970,327.69-78,815,516.23

Finding the Fourth Proportional to 128,967,393.50, 177,970,327.69 and 78,815,516.23

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Solution

The fourth proportional to 128,967,393.50, 177,970,327.69 and 78,815,516.23 is: 108,762,555.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,967,393.50 : 177,970,327.69 = 78,815,516.23 : x
  2. Step 2: Convert to fraction form
    128,967,393.50/177,970,327.69 = 78,815,516.23/x
  3. Step 3: Cross multiply
    128,967,393.50x = 177,970,327.69 × 78,815,516.23
  4. Step 4: Simplify right side
    128,967,393.50x = 14,026,823,250,509,614
  5. Step 5: Solve for x
    x = 14,026,823,250,509,614/128,967,393.50
  6. Step 6: Final answer
    x = 108,762,555.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.